Grade 7 Science practice sheet
Manitoba Curriculum · from Gradelings · Name: ______________________
Question 1
Which statement correctly describes heat and temperature?
- Heat and temperature mean exactly the same thing
- Heat is energy that moves from warmer to cooler; temperature measures average particle motion
- Heat measures how fast something is moving overall
- Temperature is the energy moving between objects
Show answer
Heat is energy that moves from warmer to cooler; temperature measures average particle motion
Hint: Heat is a transfer of energy. Temperature is a measure of an object's particles.
Question 2
A lizard lies on a sun-warmed rock and warms up. Which type of heat transfer is warming it from below?
- conduction
- convection
- evaporation
- radiation only
Show answer
conduction
Hint: Heat passes directly from the rock to the lizard where they touch.
Question 3
An astronaut has a mass of 70 kg on Earth. What is her mass on the Moon?
- 420 kg
- 70 kg
- 12 kg
- 0 kg
Show answer
70 kg
Hint: Mass does not change with place. Her weight is what changes.
Question 4
Which is a long-tailed object that orbits the Sun and whose tail points away from it?
- a satellite
- a moon
- a comet
- a dwarf planet
Show answer
a comet
Hint: Sunlight and the solar wind push the comet’s gas and dust away from the Sun.
Question 5
Lake water warms during a heat wave and holds less dissolved oxygen. How might this affect fish?
- Fish are not affected at all
- Fish breathe more easily
- Fish that need a lot of oxygen may struggle to survive
- All fish grow faster
Show answer
Fish that need a lot of oxygen may struggle to survive
Hint: Warm water holds less dissolved oxygen, an abiotic factor that fish need.
Question 6
Why are plants the base of most food chains?
- They eat the soil
- They capture the Sun’s energy as food
- They are the biggest living things
- They do not need energy
Show answer
They capture the Sun’s energy as food
Hint: All other living things depend on that energy directly or indirectly.
Question 7
A grasshopper eats grass. A frog eats the grasshopper. The frog is a…
- secondary consumer
- producer
- decomposer
- primary consumer
Show answer
secondary consumer
Hint: A primary consumer eats producers. A secondary consumer eats primary consumers.
Question 8
Put the stages of primary succession in order.
- 🪨Bare rock
- 🌾Soil builds up and grasses grow
- 🌲A mature forest develops
- 🌱Shrubs and small trees take over
Show answer
Bare rock → Soil builds up and grasses grow → Shrubs and small trees take over → A mature forest develops
Hint: Bare rock, then lichens and mosses, then soil and grasses, then shrubs, then forest.
Question 9
What does the data suggest?
Phosphorus in a lake (mg/L). A limit on phosphorus in detergents began in 2002. Year Phosphorus 2001 0.09 2006 0.06 2011 0.04 2016 0.03 - Phosphorus has not changed
- Phosphorus has risen since the limit began
- Phosphorus has fallen since the limit began, so the limit may be helping
- The data prove that nothing else could be involved
Show answer
Phosphorus has fallen since the limit began, so the limit may be helping
Hint: Compare 2001, before the limit, with the later years. Data can suggest a link, but other causes should be ruled out before saying for sure.
Question 10
A bathtub of warm water and a cup of boiling water. Which has more total thermal energy?
- Neither has any
- the cup, because it is hotter
- They have the same
- the bathtub, because it has many more particles
Show answer
the bathtub, because it has many more particles
Hint: Temperature is an average. Total thermal energy also depends on how much matter there is.
Answer key
- 1. Heat is energy that moves from warmer to cooler; temperature measures average particle motion (Heat & Particles)
- 2. conduction (Moving Heat)
- 3. 70 kg (Gravity & Tides)
- 4. a comet (Our Solar System)
- 5. Fish that need a lot of oxygen may struggle to survive (Ecosystems)
- 6. They capture the Sun’s energy as food (Photosynthesis)
- 7. secondary consumer (Food Chains & Energy)
- 8. Bare rock → Soil builds up and grasses grow → Shrubs and small trees take over → A mature forest develops (Cycles & Succession)
- 9. Phosphorus has fallen since the limit began, so the limit may be helping (People & Ecosystems)
- 10. the bathtub, because it has many more particles (Heat & Particles)
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.