Grade 3 Science practice sheet
Manitoba Curriculum · from Gradelings · Name: ______________________
Question 1
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.
Question 2
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 3
Which would be a good way to compare the speed of two toy cars?
- Colour them
- Weigh the track
- Time how long each takes to go the same distance
Show answer
Time how long each takes to go the same distance
Hint: A fair test keeps the distance the same.
Question 4
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 5
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 6
Which has a life cycle that starts as a seed?
- A bean plant
- A butterfly
- A frog
Show answer
A bean plant
Hint: Plants begin as seeds.
Question 7
Which feature do all birds have?
🐦- 🪶feathers
- 🐻fur
- 🐟gills
Show answer
🪶 feathers
Hint: Every bird has feathers, even birds that can't fly, like penguins.
Question 8
What tool measures the temperature of water?
🌡️- a balance
- a thermometer
- a hand lens
- a ruler
Show answer
a thermometer
Hint: A thermometer measures temperature.
Question 9
Which surface has the most friction?
🧱- a wet bar of soap
- sandpaper
- ice
- polished glass
Show answer
sandpaper
Hint: Rough surfaces grip and slow things down. Slippery surfaces have little friction.
Question 10
Speed tells us…
- what colour it is
- how heavy it is
- how fast something moves
Show answer
how fast something moves
Hint: Speed is the distance an object travels in a certain time.
Answer key
- 1. one thing, like the slope (Science Skills & Safety)
- 2. non-contact force (Pushes, Pulls & Forces)
- 3. Time how long each takes to go the same distance (Speed & Motion)
- 4. so people and vehicles can cross (Structures & Their Jobs)
- 5. bend or break the roof (Strong & Stable)
- 6. A bean plant (Basic Needs & Life Cycles)
- 7. 🪶 feathers (Grouping Living Things)
- 8. a thermometer (Science Skills & Safety)
- 9. sandpaper (Pushes, Pulls & Forces)
- 10. how fast something moves (Speed & Motion)
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.