Living Things
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Human Body Systems (Circulatory, Respiratory, Digestive)
SubtopicHuman Body Systems (Circulatory, Respiratory, Digestive) under Living Things for Grade 5 IB.
Preview questions (no answers)
- 1.
What travels inside the veins, arteries, and capillaries?
A.Food
B.Air
C.Blood
D.Water only
- 2.
Which of these describes the texture of food when it leaves the stomach and enters the small intestine?
A.Whole pieces of food
B.A thin liquid like water
C.A thick, mushy mixture
D.Hard and dry
- 3.
What would happen if the large intestine did not do its job?
A.Oxygen would not reach the brain
B.The body would lose too much water
C.Food would not be chewed
D.Blood would stop pumping
- 4.
Which organ is most closely associated with the word 'pulmonary'?
A.Stomach
B.Heart
C.Lungs
D.Small Intestine
- 5.
What would happen if the large intestine stopped functioning correctly?
A.The body would not be able to breathe
B.The body would not be able to break down proteins
C.The body would lose too much water and become dehydrated
D.The heart would stop pumping blood
- 6.
Why is the blood in most veins dark red (often depicted as blue in diagrams)?
A.It is carrying very little oxygen
B.It is full of nutrients from the stomach
C.It is moving much slower than arterial blood
D.It is carrying more white blood cells than red blood cells
- 7.
Which of these best describes 'inhalation'?
A.The process of carbon dioxide leaving the blood
B.The process of taking air into the lungs
C.The process of the heart pumping blood to the body
D.The process of nutrients entering the cells
- 8.
What would be the most likely consequence if the was blocked?
A.Oxygenated blood would be unable to return to the heart from the lungs.
B.Deoxygenated blood would be unable to reach the lungs to get oxygen.
C.Blood would be unable to leave the left ventricle to go to the body.
D.The digestive system would stop receiving blood from the heart.
- 9.
Which of the following is the best example of the and systems working together to maintain the body?
A.Blood in capillaries surrounding the small intestine picks up glucose to deliver to the brain.
B.The stomach produces acid that is used by the heart to pump blood.
C.The esophagus uses the pressure from the heart to move food downward.
D.The large intestine produces red blood cells from the water it absorbs.
- 10.
In the , what is the specific function of in the stomach?
A.To provide the acidic environment necessary for the enzyme pepsin to work.
B.To break down complex carbohydrates into simple sugars like glucose.
C.To coat the food so it can pass through the small intestine more quickly.
D.To turn into bile once it reaches the liver.
Download the worksheet for Living Things - Human Body Systems (Circulatory, Respiratory, Digestive) to practice offline. It includes additional chapter-level practice questions.
Ecosystems and Interdependency
SubtopicEcosystems and Interdependency under Living Things for Grade 5 IB.
Preview questions (no answers)
- 1.
Which organism would likely be a primary consumer in a wetland ecosystem?
A.An alligator
B.A heron (bird)
C.A snail eating aquatic plants
D.A large fish
- 2.
What do we call the movement of animals from one region to another in search of better climate or food?
A.Migration
B.Pollination
C.Decomposition
D.Evaporation
- 3.
What is the term for a species that is at risk of disappearing forever?
A.Extinct
B.Endangered
C.Common
D.Invasive
- 4.
Which of these is a way that animals might help plants reproduce?
A.By eating all the leaves
B.By carrying pollen from one flower to another
C.By breathing on the stems
D.By digging up the roots
- 5.
Why is biodiversity (a large variety of different species) important for an ecosystem?
A.It makes the ecosystem more beautiful to look at
B.It helps the ecosystem stay stable and recover from changes
C.It ensures that only the strongest animals survive
D.It reduces the amount of competition between animals
- 6.
Which of the following is an example of a decomposer's role in a garden?
A.A ladybug eating aphids on a rose bush
B.A worm breaking down old vegetable scraps into compost
C.A butterfly drinking nectar from a zinnia
D.A sparrow catching a grasshopper
- 7.
What is a possible consequence of overfishing a specific type of fish in the ocean?
A.The prey of that fish may overpopulate, upsetting the balance
B.The ocean will become cleaner because there are fewer fish
C.The sunlight will be able to reach deeper into the water
D.The water temperature will begin to drop
- 8.
If an invasive plant species grows much faster than native plants and is not eaten by any local herbivores, what is the most likely outcome for the local 'interdependent' system?
A.The herbivores will learn to eat the new plant within a week.
B.The native plants will go extinct in that area, and the herbivores will decline because their food source is gone.
C.The new plant will provide more oxygen, helping all the animals grow larger.
D.The native plants will start growing faster to keep up.
- 9.
Which of these is the most likely effect of a 'drought' on the interdependency within a grassland food web?
A.Predators will increase because they can find prey more easily in the short grass.
B.Producers will decrease, leading to a decrease in herbivores and subsequently a decrease in carnivores.
C.Decomposers will work faster because the ground is dry.
D.The food web will become more complex as animals try new foods.
- 10.
What is 'resource partitioning'?
A.When one species takes all the resources for itself.
B.When different species use different parts of a resource or use it at different times to avoid direct competition.
C.When humans divide resources between different countries.
D.When animals store food for the winter.
Download the worksheet for Living Things - Ecosystems and Interdependency to practice offline. It includes additional chapter-level practice questions.
Classification of Species
SubtopicClassification of Species under Living Things for Grade 5 IB.
Preview questions (no answers)
- 1.
Which animal group has three body parts (head, thorax, abdomen) and six legs?
A.Insects
B.Arachnids
C.Mammals
D.Birds
- 2.
What is the main difference between a mammal and a reptile?
A.Mammals have hair; reptiles have scales
B.Mammals lay eggs; reptiles give birth to live young
C.Mammals are cold-blooded; reptiles are warm-blooded
D.Mammals have scales; reptiles have fur
- 3.
Which of these is a reptile that has a shell?
A.Turtle
B.Salamander
C.Snail
D.Crab
- 4.
Which kingdom is made up of organisms that are mostly multi-celled and cannot move from place to place?
A.Plants
B.Animals
C.Protists
D.Monera
- 5.
Which of the following lists the taxonomic levels in the correct order from most general to most specific?
A.Kingdom, Class, Phylum, Order, Family, Genus, Species
B.Kingdom, Phylum, Class, Order, Family, Genus, Species
C.Species, Genus, Family, Order, Class, Phylum, Kingdom
D.Phylum, Kingdom, Order, Class, Family, Species, Genus
- 6.
If you are looking at a plant that has no flowers but produces seeds inside a woody cone, it is most likely a:
A.Conifer
B.Fern
C.Moss
D.Cactus
- 7.
Which of the following describes the Kingdom Protista?
A.Mainly multicellular organisms that make their own food
B.Unicellular organisms without a nucleus
C.A diverse group of mostly unicellular organisms that have a nucleus
D.Organisms that only live on land
- 8.
What is the defining characteristic of a 'species' according to the biological species concept?
A.They look exactly the same
B.They live in the same forest
C.They can breed with each other to produce fertile offspring
D.They eat the same type of food
- 9.
Which of the following classes within the Phylum Chordata includes organisms that are ectothermic, have dry scaly skin, and lay amniotic eggs on land?
A.Amphibia
B.Reptilia
C.Aves
D.Mammalia
- 10.
In the classification of the animal kingdom, what is a 'coelom'?
A.A type of wing structure
B.A fluid-filled body cavity that houses organs
C.A type of tooth used for grinding
D.A protective shell made of calcium
Download the worksheet for Living Things - Classification of Species to practice offline. It includes additional chapter-level practice questions.
Plant and Animal Adaptations
SubtopicPlant and Animal Adaptations under Living Things for Grade 5 IB.
Preview questions (no answers)
- 1.
Grasshoppers have very long and powerful hind (back) legs. What are these legs primarily used for?
A.Digging deep holes in the soil
B.Jumping long distances to escape danger
C.Walking slowly on leaves
D.Swimming in ponds
- 2.
A turtle has a hard, bony shell that covers most of its body. This is a structural adaptation used for:
A.Swimming faster through waves
B.Protecting the turtle from predators
C.Storing extra food for the winter
D.Attracting a mate
- 3.
A spider spinning a complex web to catch its food is an example of which type of adaptation?
A.Structural adaptation
B.Behavioral adaptation
C.Physical adaptation
D.Seasonal adaptation
- 4.
Why do pine trees have narrow, needle-like leaves instead of large, broad leaves?
A.To catch more sunlight in the winter
B.To help the tree grow taller
C.To reduce water loss and survive in dry or cold climates
D.To make it easier for birds to build nests
- 5.
Based on the survival needs shown in the chart, which adaptation would best help a plant in a very dark forest floor?
A.Thick bark to prevent water loss.
B.Very large leaves to capture minimal light.
C.Deep roots to find water.
D.Spines to protect from herbivores.
- 6.
The fennec fox has much larger ears than the Arctic fox. Why is the size of the ears a successful adaptation for the fennec fox in the desert?
A.Large ears help the fox hear its prey underground.
B.Large ears allow the fox to lose excess body heat to stay cool.
C.Large ears protect the fox's face from the sun.
D.Large ears make the fox look bigger to scare away predators.
- 7.
Which of these is a behavioral adaptation that help penguins survive the extreme cold of Antarctica?
A.Having a thick layer of blubber under their skin.
B.Having waterproof feathers that trap heat.
C.Huddling together in large groups to share body warmth.
D.Having short wings that are used as flippers for swimming.
- 8.
The 'lungfish' can wrap itself in a cocoon of mucus and bury itself in the mud when its lake dries up, breathing air for months or years. This is an adaptation to:
A.Seasonal flooding
B.Extreme cold
C.Periodic desiccation (drying out)
D.High salinity
- 9.
Sunflowers exhibit 'heliotropism,' where the flower head turns to follow the sun across the sky. What is the primary advantage of this behavioral adaptation?
A.To keep the flower cool by facing the sun
B.To maximize the light energy absorbed for photosynthesis and to keep the flower warm for pollinators
C.To prevent the stem from bending in one direction for too long
D.To shake off morning dew more effectively
- 10.
During a drought, some plants will enter a state of 'senescence' where they intentionally kill off their older leaves. Why is this a survival adaptation?
A.To provide mulch for the roots of the plant
B.To reduce the overall water requirement and move nutrients to the younger, more productive parts
C.To stop the plant from growing too tall and catching the wind
D.To attract decomposers to the base of the plant
Download the worksheet for Living Things - Plant and Animal Adaptations to practice offline. It includes additional chapter-level practice questions.
Microorganisms and Disease
SubtopicMicroorganisms and Disease under Living Things for Grade 5 IB.
Preview questions (no answers)
- 1.
Which of these is a natural way our body tries to get rid of germs in our nose?
A.Blinking
B.Sneezing
C.Sweating
D.Sleeping
- 2.
What is the main reason we wash fruits and vegetables before eating them?
A.To make them shinier
B.To remove dirt and potential harmful microorganisms
C.To make them easier to chew
D.To change their taste
- 3.
Why is it important to complete the full course of antibiotics a doctor gives you?
A.To make the medicine taste better
B.To ensure all the harmful bacteria are killed
C.To save money
D.To help you sleep
- 4.
Which of the following is true about all microorganisms?
A.They all cause disease
B.They are all visible to the eye
C.They are all living or contain genetic material
D.They all live in the ocean
- 5.
What is the study of microorganisms called?
A.Botany
B.Microbiology
C.Zoology
D.Geology
- 6.
How does 'canning' (putting food in sealed jars and heating them) preserve food?
A.It adds extra air to the jar.
B.The heat kills microorganisms, and the seal prevents new ones from entering.
C.It turns the food into a liquid that germs don't like.
D.It makes the food too hard for bacteria to bite.
- 7.
Which of these is a common place where you would find a large number of 'good' bacteria in the human body?
A.In the eyeballs
B.In the digestive system (intestines)
C.In the heart muscle
D.Inside the brain
- 8.
What is the primary role of 'memory B-cells' in the immune system after an initial infection has been cleared?
A.To eat any dead cells left over from the battle.
B.To remember the specific shape of the pathogen's antigens to mount a faster response upon re-exposure.
C.To produce toxins that keep the body's temperature high.
D.To travel to the brain and store memories of how the person felt while sick.
- 9.
Which of the following best describes how an antiseptic differs from an antibiotic?
A.Antiseptics are taken as pills, while antibiotics are liquids.
B.Antiseptics are used on living tissue (like skin) to kill microbes, while antibiotics are medicines used to kill bacteria inside the body.
C.Antiseptics only work on viruses, while antibiotics only work on fungi.
D.Antiseptics are made by bacteria, while antibiotics are made by humans in factories.
- 10.
Why is it biologically incorrect to say that 'microorganisms are only found in dirty places'?
A.Because microorganisms only live in water, not on land.
B.Because microorganisms are ubiquitous, meaning they are found almost everywhere on Earth, including extreme environments and inside healthy organisms.
C.Because microorganisms are only created when humans make a mess.
D.Because microorganisms can only be seen with a telescope, not in a room.
Download the worksheet for Living Things - Microorganisms and Disease to practice offline. It includes additional chapter-level practice questions.