Chemistry unit 1 review

What is the factor that an experimenter changes on purpose?

• Dependent Variable
• Independent Variable
• Constant
• Control

The type of variable that responds to the experiment and is what you measure or count to determine if your hypothesis is true.

• Independent
• Dependent
• Control

Tags

NGSS.MS-PS3-4

Esther became interested in insulation while her parent’s new house was being built. She decided to determine which insulation transferred the least heat. She filled each of 5 jars half-full with water.

She sealed each jar with a plastic lid.Then she wrapped each jar with a different kind of insulation. She put the jars outside in the direct sunlight. Later, she measured the temperature of the water in each jar. What is the independent variable?

• The type of insulation

• The temperature of the water

• Number of houses

• The amount of sunlight

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

How many variables should you change in an experiment?

• none
• only 1

• 2 or more
• depends on the type of experiment

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed a tomato plant in 6 identical 10 inch pots with the same amount and type potting soil. She watered them ¼ cup each day. 3 plants were placed under a cardboard box and 3 plants were placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the dependent variable?

• Using the same type of plant

• Each plant was placed in a 10 inch pot

• The growth of the plant

• 3 plants in the sunlight and 3 plants under a box

Tags

NGSS.MS-LS1-5

How many significant figures: 153.0 mL

• 1
• 2
• 3
• 4

How many significant figures: 1000 mL

• 1
• 2
• 3
• 4

Which of the following conversion factors could you use to convert between g and kg?

•  $\frac{1\ kg}{1000\ g}$ 

•  $\frac{1000\ kg}{1\ g}$ 

•  $\frac{100\ g}{1\ kg}$ 

•  $\frac{10\ kg}{1\ g}$ 

How many liters are in 34.72 mL?

• 0.03472 L

• 34,720 L

• 3,472 L

• 0.34720 L

The Olympic record for the high jump is just over 2.6 yards. What is that distance in feet? (1 yd = 3 ft)

• 0.867 ft

• 7.8 ft

• 2.6 ft

• 93.6 ft