Quarter 1 Exam 2023

A girl wants to know what kind of soil is best for plants. She gives one sand, one compost, and one clay. What is the independent variable?

• water

• type of plant

• sunlight

• soil

Angelina set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the dependent variable.

• Distance traveled by the ball
• Height of the ramp
• Mass of the ball
• Who set up the experiment (Ms. S, etc)

The one factor that a scientist changes during an experiment. (It affects the results of the experiment).

• Controlled Variable

• Dependent Variable

• Independent Variable

The variable that is measured. It is the result of the experiment.

• Controlled Variable

• Dependent Variable

• Independent Variable

The factors that stay the same throughout the experiment.

• Constant

• Dependent Variable

• Independent Variable

If an object is ​ ​ (a)   than water, the object will ​ (b)   .

• less dense
• float
• More dense
• the same density
• sink
• Stay suspended in the water
• bounce
• more
• less

Correctly identify the state of the matter in the middle cylinder.

b

Solid

Liquid

Gas

Jack had a beaker of warm water filled to the 50 ml line. He measured 20 mg of salt using a triple beam balance and added it to his beaker of warm water. Jack stirred using a spoon. After a short time, the salt disappeared. What happened?

• The salt dissolved.

• The salt evaporated.

• The salt condensed.

• The salt changed it's chemical make up and became water.

The two types of properties used to classify matter are ________ and chemical.

________ properties change the composition of the substance.