Grade 9 end of year Science quiz

What is Newton's first law of motion?

• Every action has an equal opposite reaction

• An object in motion stays in motion unless acted upon by an unbalanced force

• The force acting on an object is equal to the mass of an object times its acceleration

• Sandwich

The powerhouse of the cell is the...It converts energy from food into energy the cell can use

• Mitochondrion
• Golgi body
• Nucleus
• Ribosomes

Plants perform photosynthesis through this organelle.  It captures energy from the sun and uses it to produce food for the cell.

• Chlorophyll
• Chloroplasts
• Mitochondria
• Golgi Apparatus

A living thing, such as a plant, that can make its own food

• Producer
• Consumer
• Herbivore
• Carnivore

Which of the following determines if an object sinks or floats?

• density
• mass
• weight
• volume

In an experiment, the one variable that is changed by the scientist is called the ______.

• independent variable
• dependent variable
• random variable
• controlled variable

In an experiment, the factor that we observe and/or measure is called the ____.

• independent variable
• dependent variable
• random variable
• controlled variable

A testable, possible explanation for a scientific question is called a(n) _____.

• theory
• random guess
• law
• hypothesis

Observations that are made with instruments such as rulers, balances, graduated cylinders, thermometers, timers, etc. and are measurable.

• manipulated
• quantitative
• qualitative
• operational

A scientist studies how many days it takes people to get sick when eating different candies.  What is the independent variable?

• eating
• days until sick
• the scientist
• candies