Grade 8 Science practice sheet
Nunavut Curriculum · from Gradelings · Name: ______________________
Question 1
Which is a solution?
- sugar completely dissolved in water
- sand stirred into water
- oil floating on vinegar
- pebbles in a bucket
sugar completely dissolved in water
Hint: A solution looks like one material because the solute is spread evenly through the solvent.
Question 2
What happens to the particles of a substance when it is heated?
- They move faster.
- They shrink.
- They stop moving.
- They disappear.
They move faster.
Hint: Heat adds energy, so particles move faster.
Question 3
Which factor does NOT directly change how fast a liquid flows through a pipe?
- the width of the pipe
- the length of the pipe
- the colour of the liquid
- the viscosity of the liquid
the colour of the liquid
Hint: Narrow, long pipes and thick fluids slow flow. Colour does not matter.
Question 4
Which state of matter usually has the lowest density?
- They are all the same.
- solid
- gas
- liquid
gas
Hint: Gas particles are very far apart.
Question 5
A force of 80 N pushes on an area of 4 m². What is the pressure in Pa (N/m²)?
answer boxPa
20 Pa
Hint: Pressure = force ÷ area.
Question 6
How does the heart act like the pump in a hydraulic system?
- It stores air in tanks.
- It removes all pressure.
- It pushes fluid through a network of tubes.
- It changes the fluid into a solid.
It pushes fluid through a network of tubes.
Hint: Both pumps create the pressure that moves a fluid.
Question 7
What are the products of cellular respiration?
- energy, carbon dioxide and water
- glucose and oxygen
- only sugar
- only oxygen
energy, carbon dioxide and water
Hint: Cells use glucose and oxygen to release energy, making carbon dioxide and water.
Question 8
Put these levels of organization in order from smallest to largest.
- 🔬Cell
- 🫀Organ
- 🫁Organ system
- 🧍Organism
Cell → Organ → Organ system → Organism
Hint: Cells make tissues, tissues make organs, organs work in systems, and systems make up an organism.
Question 9
For a washing machine, is each item an input or an output?
Sort into: ⬇️ Input · ⬆️ Output
- ✨clean clothes
- 👕dirty clothes
- 🔌electrical energy
- 🌡️waste heat
- 🔊noise
- 🧴laundry soap
- 🪣used soapy water
- 🚿fresh water
⬇️ Input: dirty clothes, electrical energy, laundry soap, fresh water · ⬆️ Output: clean clothes, waste heat, noise, used soapy water
Hint: Inputs go into the system. Outputs come out of it.
Question 10
Put the path of food through the digestive system in order.
- 🍽️Stomach
- ⬇️Esophagus
- 👄Mouth
- 💧Large intestine
Mouth → Esophagus → Stomach → Large intestine
Hint: Food is chewed in the mouth, travels down the esophagus, is mixed in the stomach, has nutrients absorbed in the small intestine and has water absorbed in the large intestine.
Answer key
- 1. sugar completely dissolved in water (Mixtures, Solutions & WHMIS)
- 2. They move faster. (Particles & Matter)
- 3. the colour of the liquid (Viscosity & Flow)
- 4. gas (Density & Buoyancy)
- 5. 20 Pa (Pressure & Pascal's Law)
- 6. It pushes fluid through a network of tubes. (Hydraulics & Pneumatics)
- 7. energy, carbon dioxide and water (Cells & Life Processes)
- 8. Cell → Organ → Organ system → Organism (Cells, Tissues & Organs)
- 9. ⬇️ Input: dirty clothes, electrical energy, laundry soap, fresh water · ⬆️ Output: clean clothes, waste heat, noise, used soapy water (Systems in Action)
- 10. Mouth → Esophagus → Stomach → Large intestine (Human Body Systems)
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.