Science midterm

Question 1

5. Why is a control group especially important in biological investigations?

Answer 1

The control group is just as important as the experimental group; without it there would be no experiment.

Question 2

6. The scientific method involves making a hypothesis, carrying out experiments, recording results, and forming conclusions. Why is it a good idea to repeat an experiment many times?

Answer 2

to make sure that the first results weren’t just an accident.

Question 3

9. What are the eight characteristics of all living things?

Answer 3

reproduction, heredity, cellular organization, growth and development, response to stimuli, adaptation through evolution, homeostasis, and metabolism. DNA

Question 4

16. In a cup of tea, what is the solvent? What is the solute?

Answer 4

water is the solvent teabag is the solute

Question 5

19. What are the 3 subatomic particles that make up an atom? For each subatomic particle, include the mass and charge

Answer 5

protons, neutrons and electrons. Electron negative neutrons no charge protons positive

Question 6

20. What subatomic particle is different in isotopes of the same element? Does this affect the mass or the charge of the atom?

Answer 6

Neutrons carbon has a atomic number of 6 isotopes 14-6 =8

Question 7

21. What are the differences between ionic bonds and covalent bonds?

Answer 7

how the electrons are used ionic bonds are tranfefered elctron are shared