1. Which of the following terms describes a variable that does not change in an experiment?
A. hypothesis C. constant
B. dependent D. independent
variable
100
Most materials ______ when heated and _______ when cooled.
expand; contract
100
the study of heredity
What is genetics?
100
2. Which of the following is an abiotic factor?
A. penguins C. soil bacteria
B. rain D. redwood trees
rain
100
This is the unit of measurement in a graduate cylinder.
milliliters
200
To make sure experimental results are valid, which of these procedures must be followed?
A. conduct multiple trials C. add bias
B. pick two hypothesis D. communicate uncertain results
conduct multiple trials
200
the greater the _________ of a moving object, the more kinetic energy it has.
mass
200
Genes are found in the nucleus of the cell and are stored on these.
What are chromosomes?
200
The gas that plants leaves give off after they take in carbon dioxide.
What is oxygen?
200
the variable that the experimenter chooses to test
What is an independent variable?
300
the tool that is used to measure mass
What is a balance?
300
Potential energy due to it height.
What is gravitational potential energy?
300
A description of an individual that has two different alleles for a trait.
What is heterozygous?
300
Anything that has mass and takes up space.
What is matter?
300
The variable that we measure during the experiment.
What is a dependent variable?
400
an observation that states something about an experiment that can be measured and expressed in the form of a number, such as a weight, height, count, etc.
What is a quantitative observation?
400
The energy in stored foods and fuels are examples of ____________ potential energy.
chemical
400
A diagram that predicts the outcome of a genetic cross by considering all possible combinations of gametes in the cross.
What is a Punnett Square?
400
These are caused by the moon's pull of gravity on the water of Earth.
Tides
400
The curved surface of a liquid.
What is a meniscus?
500
an observation that uses one of the senses and makes a statement involving color, shape, or some other quality being observed. There are no numbers involved.
What is a qualitative observation?
500
the sum of kinetic and potential energy
What is mechanical energy?
500
the first scientist to develop rules that accurately predict patterns of heredity.
Who was Gregor Mendel?
500
This is the reason for day and night on Earth.
the rotation of the earth on its axis
500
A statement of what an investigator thinks may happen during an experiment.