9th grade Science practice sheet
Maine Learning Results · from Gradelings · Name: ______________________
Question 1
During which stage do chromosomes line up in the middle of the cell?
- telophase
- metaphase
- anaphase
- prophase
metaphase
Hint: In metaphase, chromosomes line up along the cell's center before being pulled apart.
Question 2
In plants, what are the male parts of a flower called (together)?
- sepals
- petals
- stamens
- pistils
stamens
Hint: Stamens (anther + filament) make pollen. The pistil is the female part.
Question 3
How many valence electrons (electrons in the outer shell) does aluminum (Al) have?
- 4
- 2
- 13
- 3
3
Hint: Aluminum has 13 electrons in shells of 2, 8, 3. The outer shell holds 3.
Question 4
A salt crystal such as NaCl conducts electricity when dissolved in water because…
- the atoms melt
- the water turns into metal
- the electrons are destroyed
- the ions are free to move and carry charge
the ions are free to move and carry charge
Hint: Free-moving ions can carry current in solution.
Question 5
What are the products of photosynthesis?
- glucose and oxygen
- water and oxygen only
- carbon dioxide and water
- carbon dioxide and glucose
glucose and oxygen
Hint: The plant stores energy in glucose and releases oxygen.
Question 6
Which is the only common metal that is a liquid at room temperature?
- aluminum
- copper
- iron
- mercury
mercury
Hint: Mercury is liquid at about 20 °C.
Question 7
In a chemical reaction, what are the reactants?
- the starting substances
- the container
- the new substances formed
- the energy released
the starting substances
Hint: Reactants are what you start with. Products are what you end up with.
Question 8
A trait that helps an organism survive and reproduce in its environment is called an…
- adaptation
- accident
- mutation only
adaptation
Hint: Adaptations make an organism better suited to its environment.
Question 9
Which energy source is non-renewable?
- hydro
- solar
- natural gas
natural gas
Hint: It forms over millions of years.
Question 10
A 4 kg ball moves at 5 m/s. Its momentum is…
- 9 kg·m/s
- 45 kg·m/s
- 20 kg·m/s
- 1.25 kg·m/s
20 kg·m/s
Hint: p = m × v.
Answer key
- 1. metaphase (Cells from Cells)
- 2. stamens (Reproduction)
- 3. 3 (Atoms & Electrons)
- 4. the ions are free to move and carry charge (Electrons & Compounds)
- 5. glucose and oxygen (Photosynthesis & Respiration)
- 6. mercury (The Periodic Table)
- 7. the starting substances (Chemical Change)
- 8. adaptation (Evolution & Selection)
- 9. natural gas (Energy & Magnetism)
- 10. 20 kg·m/s (Forces, Motion & Momentum)
Want more than 10 questions?
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