Grade 3 Science practice sheet
Ontario Curriculum · from Gradelings · Name: ______________________
Question 1
Plants take in nutrients from the…
🪴- wind
- clouds
- soil
- moonlight
Show answer
soil
Hint: Nutrients are like vitamins for plants. They are in the soil.
Question 2
Put the life cycle of a bean plant in order. Tap the first stage first.
- 🌱seed sprouts
- 🌿seedling with leaves
- 🌼plant with flowers
- 🫘pods with new seeds
- 🌰seed
Show answer
seed → seed sprouts → seedling with leaves → plant with flowers → pods with new seeds
Hint: A seed sprouts into a seedling, grows leaves, flowers, and makes new seeds.
Question 3
Cutting down a whole forest to build a parking lot can…
🌲- help the soil
- destroy the habitat of plants and animals
- give plants more room
- make more habitats
Show answer
destroy the habitat of plants and animals
Hint: Plants and animals live in forests. Taking away the forest takes away their homes.
Question 4
Two magnets push each other apart without touching. This shows a…
🧲- friction
- contact force
- non-contact force
- twisting force
Show answer
non-contact force
Hint: The magnets act from a distance.
Question 5
A bridge has a flat surface on top. Why?
🌉- to look like a mountain
- so it can float
- to hold water
- so people and vehicles can cross
Show answer
so people and vehicles can cross
Hint: The bridge's job is to carry traffic across a gap.
Question 6
Heavy snow piles on a flat roof. What could the force of the snow do?
❄️- make it hotter
- make it lighter
- bend or break the roof
- make it taller
Show answer
bend or break the roof
Hint: A large load can change the shape of a structure.
Question 7
Clay soil holds water but drains slowly. What could this mean for a garden?
🌧️- water will rise into the sky
- plants might get too wet
- plants will get no nutrients
- plants will always get too dry
Show answer
plants might get too wet
Hint: Water stays a long time in clay, so roots can get too wet.
Question 8
Does it help soil or hurt it? Tap an item, then tap its basket.
Sort into: 💚 helps soil · ⚠️ hurts soil
- ♻️adding compost
- 🧂piling road salt near a garden
- 🟫leaving a field bare all winter
- 🧪too much fertilizer
- 🌳planting trees on a slope
- 🍂spreading mulch on a garden
Show answer
💚 helps soil: adding compost, planting trees on a slope, spreading mulch on a garden · ⚠️ hurts soil: piling road salt near a garden, leaving a field bare all winter, too much fertilizer
Hint: Compost, cover crops and tree roots protect soil. Spills, bare ground and too much salt hurt it.
Question 9
Wind can pile sand into hills called…
🏜️- glaciers
- deltas
- dunes
Show answer
dunes
Hint: Sand dunes are made by wind blowing sand into big piles.
Question 10
In a fair test about how fast a car rolls, you keep the ramp, the car and the floor the same. What do you change?
🏎️- nothing
- one thing, like the slope
- everything
- the ramp, car and floor
Show answer
one thing, like the slope
Hint: One changed thing lets you tell what caused the result.
Answer key
- 1. soil (Plant Parts & Needs)
- 2. seed → seed sprouts → seedling with leaves → plant with flowers → pods with new seeds (How Plants Grow & Change)
- 3. destroy the habitat of plants and animals (Plants & People)
- 4. non-contact force (Pushes, Pulls & Forces)
- 5. so people and vehicles can cross (Structures & Their Jobs)
- 6. bend or break the roof (Strong & Stable)
- 7. plants might get too wet (What Soil Is Made Of)
- 8. 💚 helps soil: adding compost, planting trees on a slope, spreading mulch on a garden · ⚠️ hurts soil: piling road salt near a garden, leaving a field bare all winter, too much fertilizer (Caring for Soil)
- 9. dunes (Wind, Water & Ice)
- 10. one thing, like the slope (Science Skills & Safety)
Want more than 10 questions?
In Gradelings the questions change every time and adjust to your child, with hints and kind feedback. See all science units.