Grade 9 revision 1

A testable idea or explanation that leads to scientific investigation based on prior knowledge is known as:

• theory
• experiment
• observation
• hypothesis

________ is the process of obtaining information by using the senses.

• analyze
• inference
• observation
• hypothesis

Research question: does the distance a person kicks a soccer ball effect how well they will do on their math test. What is the dependent variable?

• How far they kick the soccer ball
• who the person is
• how well they do on the math test
• Type of soccer ball.

People have 206 bones. The tiniest bone is inside the ear. It is 3 millimeters long. It is called the stapes, or stirrup.

• Fact
• Theory
• Law

Which observation is quantitative?

• It is 5 cm long
• It is smooth
• It looks red
• It is dry

A series of steps used by scientists to solve a problem or answer a question.

• scientific method
• recipe
• data collection
• metric system

If you increase the amount of spinach you eat, then you will increase the iron in your blood. What's the dependent variable?

• increase the amount of iron in your blood
• spinach you eat

YOU are a multi-celled organism but an amoeba is a single celled organism.

• All living things have cells
• All living things grow
• All living things use energy
• All living things respond to their environment

In all of our cells there is DNA. Which characteristic of life does this fact best describe?

• living things respond
• living things maintain internal balance
• living things are based on a universal genetic code
• living things grow and develop

When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. Which characteristic of life does this represent?

• All living things use energy
• All living things contain cells
• All living things maintain homeostasis
• All living things grow