Living Things
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Human Body Systems (Digestive, Skeletal, and Muscular)
SubtopicHuman Body Systems (Digestive, Skeletal, and Muscular) under Living Things for Grade 4 IB.
Preview questions (no answers)
- 1.
What do we call the tiny bones that make up our fingers and toes?
A.Vertebrae
B.Phalanges
C.Ribs
D.Femurs
- 2.
Which organ is shaped like a 'J' and stores food while it is being broken down?
A.The liver
B.The stomach
C.The large intestine
D.The bladder
- 3.
How do bones change as a person grows from a baby to an adult?
A.They disappear
B.They become softer
C.They grow longer and some fuse together
D.They turn into muscles
- 4.
What sends signals to your muscles to tell them when to contract and move?
A.The stomach
B.The brain
C.The skin
D.The lungs
- 5.
The digestive system and the muscular system work together to process the food we eat. Based on the diagram, what is the name of the muscle labeled 'T' that helps move food from the mouth so it can be swallowed?
A.The stomach
B.The tongue
C.The liver
D.The lungs
- 6.
Most bones in the human skull are connected by 'fixed joints' that do not move. However, the bone labeled 'Part B' in the diagram is connected by a movable joint. What is the primary job of Part B?
A.To produce new red blood cells for the body
B.To protect the brain from accidental bumps
C.To allow for chewing food and speaking
D.To connect the skull to the shoulder blades
- 7.
What is the primary role of the pancreas in digestion?
A.To store undigested food
B.To produce digestive juices that break down fats, proteins, and carbs
C.To push food through the small intestine
D.To absorb water from waste
- 8.
Which of the following describes the most complete path of a piece of food through the digestive system?
A.Mouth -> Esophagus -> Stomach -> Small Intestine -> Large Intestine -> Exit.
B.Mouth -> Stomach -> Liver -> Small Intestine -> Heart -> Exit.
C.Mouth -> Esophagus -> Small Intestine -> Stomach -> Large Intestine -> Exit.
D.Mouth -> Trachea -> Stomach -> Small Intestine -> Large Intestine -> Exit.
- 9.
Why is it important that the muscles in our digestive system are 'involuntary'?
A.So that we can focus our thoughts on moving our arms and legs.
B.So that digestion can continue even while we are asleep or not thinking about it.
C.Because involuntary muscles are the only ones that can touch acid.
D.To ensure that food only moves when we want it to move.
- 10.
Which statement best describes how the body maintains the 'balance' of the skeletal system?
A.By never moving, so the bones do not wear out.
B.By constantly breaking down old bone tissue and replacing it with new bone tissue using minerals.
C.By stretching the bones every morning to make them longer.
D.By keeping the bones completely dry and away from blood.
Download the worksheet for Living Things - Human Body Systems (Digestive, Skeletal, and Muscular) to practice offline. It includes additional chapter-level practice questions.
Plant Life Cycles and Photosynthesis
SubtopicPlant Life Cycles and Photosynthesis under Living Things for Grade 4 IB.
Preview questions (no answers)
- 1.
Which part of the plant is most likely to be found underground?
A.Flower
B.Leaf
C.Root
D.Fruit
- 2.
In the life cycle of a cherry tree, what comes after the flower?
A.The root
B.The cherry fruit
C.The seedling
D.The trunk
- 3.
What do we call the process of a plant making its own food?
A.Respiration
B.Digestion
C.Photosynthesis
D.Evaporation
- 4.
If a plant is described as 'evergreen', what does that mean?
A.It never grows flowers
B.It keeps its leaves all year round
C.It is made of plastic
D.It only grows in the winter
- 5.
Which part of the flower attracts insects with its bright colors and patterns?
A.The Sepal
B.The Stem
C.The Petal
D.The Root
- 6.
If a plant's roots are damaged and cannot absorb water, how will this affect photosynthesis?
A.Photosynthesis will happen faster
B.Photosynthesis will stop because water is a necessary ingredient
C.The plant will use more carbon dioxide instead
D.The leaves will turn blue to attract water
- 7.
What is the name of the process where a plant grows towards a light source?
A.Photosynthesis
B.Phototropism
C.Germination
D.Pollination
- 8.
What happens to the 'ovule' of a flower after fertilization has successfully occurred?
A.It withers and falls off the plant.
B.It develops into the protective seed coat and the embryo.
C.It turns into the brightly colored petals to attract more bees.
D.It becomes the stem that supports the new fruit.
- 9.
A plant is kept in a dark room for 48 hours. When a leaf is tested with iodine (which turns blue-black in the presence of starch), the leaf stays brown. What does this suggest?
A.The plant has died and can no longer store starch.
B.The plant has used up its stored starch for energy because it couldn't make new glucose.
C.Iodine only works on plants that are currently in the sun.
D.The plant has converted all its starch into oxygen to breathe.
- 10.
If a student removes all the petals from a wind-pollinated flower, how will it likely affect the plant's reproduction?
A.The plant will be unable to reproduce because it cannot attract insects.
B.The plant will be unaffected because wind-pollinated flowers usually have small or no petals anyway.
C.The plant will stop producing pollen because the petals produce the pollen.
D.The seeds will become smaller because the petals provide nutrients to the ovary.
Download the worksheet for Living Things - Plant Life Cycles and Photosynthesis to practice offline. It includes additional chapter-level practice questions.
Animal Adaptations and Habitats
SubtopicAnimal Adaptations and Habitats under Living Things for Grade 4 IB.
Preview questions (no answers)
- 1.
Which of these is the best description of an 'adaptation'?
A.A trick that an animal learns at a circus
B.A feature or behavior that helps a living thing survive in its environment
C.The name of the place where an animal lives
D.A type of food that all animals eat
- 2.
A kangaroo has a pouch. What is the main purpose of this adaptation?
A.To store extra grass for later
B.To carry and protect its developing young (joey)
C.To help the kangaroo jump higher
D.To collect rainwater for drinking
- 3.
A jellyfish has stinging tentacles. How does this adaptation help it?
A.To help it swim faster in a straight line
B.To catch food and defend itself
C.To keep it warm in the deep sea
D.To help it see in the dark
- 4.
A bat uses echolocation (sound waves) to find its way. Why is this adaptation important?
A.Because bats live in bright sunshine
B.Because bats are active in the dark and need to find food
C.Because bats cannot move their wings without sound
D.Because bats eat only rocks
- 5.
What is the primary difference between a structural adaptation and a behavioral adaptation?
A.Structural is a body part, while behavioral is an action an animal does
B.Structural is an action, while behavioral is a body part
C.Structural happens quickly, while behavioral takes millions of years
D.Structural only happens in plants, while behavioral only happens in animals
- 6.
Many animals that live in caves have no eyes or very poor eyesight. Why is this?
A.Eyes are not useful in a habitat with no light
B.They use their eyes to find water instead of light
C.The cave air is too dusty for eyes to work
D.They only eat plants that grow in the dark
- 7.
Which of these is the best example of a physiological adaptation (a body process)?
A.A snake producing venom to paralyze its prey
B.A bird building a nest in a thorny bush
C.A rabbit having long ears to hear predators
D.A monkey using a stick to find insects
- 8.
If an animal has a 'vestigial' structure (a body part that no longer has a clear function), what does this most likely tell scientists about its ancestors?
A.The ancestors lived in a different habitat where that body part was useful.
B.The animal is currently evolving a brand new adaptation for the first time.
C.The animal is a hybrid of two different species from different habitats.
D.The ancestors did not have any adaptations and lived in a stable environment.
- 9.
A species of owl has evolved nearly silent flight due to the special structure of its feathers. This adaptation is most useful because:
A.It allows the owl to sneak up on prey that has very sensitive hearing.
B.It helps the owl fly faster than other birds of prey like hawks.
C.It prevents the owl from being heard by its own offspring in the nest.
D.It reduces the amount of energy the owl uses when flying long distances.
- 10.
How do the 'air sacs' in a kelp plant act as an adaptation that supports the animals living in a kelp forest habitat?
A.They keep the kelp leaves floating near the surface where there is more sunlight and oxygen.
B.They provide small rooms for tiny fish to build their nests inside.
C.They release oxygen directly into the mouths of the fish swimming by.
D.They trap heat from the sun to warm the surrounding ocean water.
Download the worksheet for Living Things - Animal Adaptations and Habitats to practice offline. It includes additional chapter-level practice questions.
Food Chains and Ecosystems
SubtopicFood Chains and Ecosystems under Living Things for Grade 4 IB.
Preview questions (no answers)
- 1.
Which animal would you most likely find in a rainforest ecosystem?
A.Camel
B.Toucan
C.Penguin
D.Polar bear
- 2.
What happens to the energy as it moves through a food chain?
A.It increases at every step
B.It stays the same
C.It is passed from one organism to another
D.It disappears completely
- 3.
Which of these could be a primary consumer?
A.An oak tree
B.A grasshopper
C.A mountain lion
D.An owl
- 4.
What is the main source of food for a herbivore?
A.Insects
B.Plants
C.Other herbivores
D.Dead animals
- 5.
If all the decomposers in a forest were suddenly removed, what would be the most noticeable long-term effect?
A.The forest would become very quiet.
B.Dead leaves and animals would pile up, and the soil would lose its richness.
C.Plants would grow much taller and faster.
D.Animals would stop eating plants.
- 6.
What is the name for a consumer that only eats other animals?
A.Herbivore
B.Producer
C.Carnivore
D.Omnivore
- 7.
How do plants contribute to the survival of animals in an ecosystem besides providing food?
A.By keeping the ground dry.
B.By providing shelter and nesting sites.
C.By making the soil cold.
D.By scaring away predators.
- 8.
If an ecosystem has a 'high biodiversity,' what does that mean?
A.It has a very large number of the same kind of animal.
B.It has many different species of plants and animals living together.
C.It is located very high up on a mountain.
D.It is an ecosystem that has been created by humans.
- 9.
In a garden ecosystem, which of these changes would most likely lead to an increase in the number of slugs (which eat leaves)?
A.A decrease in the amount of rainfall.
B.An increase in the number of birds that eat slugs.
C.A decrease in the population of frogs that eat slugs.
D.Removing all the plants from the garden.
- 10.
What is the main difference between a scavenger and a predator?
A.A scavenger is a producer, while a predator is a consumer.
B.A scavenger finds and eats animals that are already dead, while a predator hunts and kills live prey.
C.A predator eats plants, while a scavenger eats meat.
D.Scavengers live in the water, while predators live on land.
Download the worksheet for Living Things - Food Chains and Ecosystems to practice offline. It includes additional chapter-level practice questions.