Biology Middle School

A swim team thinks that the swimsuits and swim caps they use may affect the team's performance. The swim team decides to test if the swimsuits make a difference on how fast they can swim. They split the team in two groups. The two groups wear different kinds of swimsuits and different kinds of swim caps.

Why is their test invalid?


A.The swim team didn't have enough members.
B.They should have changed one variable, keeping the other the same.
C.They all swam different speeds on purpose.
D.Actually, the test is valid.

Answers

Answer 1

Answer:

A

Explanation:

They need a control group

Answer 2
The answer is A ……………

Related Questions

The work of good science involves __________.
A.
glorifying God
C.
neither A nor B
B.
showing love to your neighbor
D.
both A and B

Answers

C hopefully this helps
C is the correct answer :)

which reproduces slowest: bacteria, viruses, fungi, or protists? and why?

Answers

Answer: Bacteria

Explanation: Bacteria- mostly is a free-living organisms and viruses can never reproduce on its own, but a bacterial cell can

Bacteria, Viruses are even smaller than bacteria. They aren't even a full cell. They are simply genetic material (DNA or RNA) packaged inside of a protein coating.

What happens to the brain after it is attacked with prions from a mad cow?
a.) swollen
b.) holey
c.) it shrinks
d.) it contains extra grey matte

Answers

Answer:

im not entirely sure, but I think it's b.

Explanation:

The human brain will get hokey due to the prions from the mad cow

Joey looked at this picture and said "It must be raining outside." His statement is a(n)
A.inference.
B.quantitative observation.
C.prediction.
D.qualitative observation.

Answers

I think it’s D because it’s an observation and not quantitative because there’s no number
It might be D because of an observation

Plant and animal cells are surrounded by a cell membrane, but only plant cells have a rigid ______.

Answers

Cell wall (made of cellulose)

Answer:

have a rigid Cell wall

how does the organization of the organism work together to function properly

Answers

Answer:

Like cells and tissues, organs seldom work alone. They "cooperate" with one another and form specific organ systems. Organ systems are the fourth level of organization in living things. An organ system is a group of organs working together to perform a specific function for the organism.

Humans—and other complex multicellular organisms—have systems of organs that work together, carrying out processes that keep us alive.
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.
The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.

A student is interested in the behavior of fish. He has 4 fish bowls and 20 goldfish. He puts the same number of fish in every bowl and puts them under light. He changes the temperature of each fish bowl, and he observes the behavior of the fish. What can the student find out from doing just this experiment?
A.If the temperature of the fish bowl and the amount of light affect the behavior of the fish.
B.If the temperature of the fish bowl affects the behavior of the fish.
C.If the number of fish, the temperature, and the amount of light affect the behavior of
D.If the number of fish in the fish bowl affects the behavior of the fish.

Answers

Answer:

B

Explanation:

The student is changing the temperature of each bowl. He has the same number of fish in each bowl so he will not be able to see if the number of fish in each bowl affects their behaviour. The light is above every bowl so he will not be able to assess if that changes their behaviour either

B . If the temperature of the fish bowl affects the behavior of the fish.
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