Which method would best separate salt from saltwater?
C) Evaporation
In chromatography, what causes the different substances to separate?
A) Solubility and particle size
What happens to particles in a substance as it is heated?
B) They move faster
Which of the following structures is found in both plant and animal cells?
C) Nucleus
What is the correct electron configuration for oxygen (atomic number 8)?
B) 2, 6
Which statement about prokaryotic cells is true?
D) They do not have a nucleus
Which of the following is NOT a safe lab practice?
C) Eating during a lab
Which group on the periodic table contains elements that are very reactive metals?
A) Group 1
Which of the following is a physical change?
C) Melting ice
What is the function of the cell membrane?
B) Control what enters and exits the cell
What did Dalton believe about atoms?
C) They are indivisible and unique for each element
Which process results in greater genetic variation?
C) Sexual reproduction
Which experiment led to the discovery of the nucleus?
A) Gold foil experiment
Asexual reproduction results in offspring that are:
B) Genetically identical
The shape of DNA is best described as:
D) Double helix