Chem Test Review

The diagram shows a plant growth investigation. Which variable is most likely being tested (Independent Variable)?

• Soil volume

• Hours of light exposure

• Soil pH

• Plant type

What is the dependent variable?

• Temperature
• Sugar and Salt
• Amount of solute
• Amount of water

What is the dependent variable?

• Amount of each trash
• Type of trash
• Where the trash is located
• When the trash was picked up

What is a constant/control in an experiment?

• Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.

• It's the variables that the scientist changes in the experiment

• It's the variables that are being measured in an experiment

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• type of plant

• the amount of sunlight

• the type of music

• the type of liquid

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?

• type of plant, amount of music, and sunlight

• plant growth

• water, apple juice, milk

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the

• type of soda given to each group

• amount of soda given to each group

• pulse rate of each group

• age of participants in each group

Water fleas are placed in 40°C water and 20^oC water and their heart rates are recorded. What is the independent variable?

• heart rate

• temperature of water

• # of water fleas

• type of liquid

• type of flea

What is the tool, a graduated cylinder measuring?

• Volume
• Length
• Mass
• Temperature

What is the volume of the rock after water displacement?

• 1.8mL
• .6mL
• 1.1mL
• 1.2