Biology Unit 1 Review 24/25

When designing an experiment, scientists will test a relationship between a “cause” and an “effect.” The “effect” is known as the .

• dependent variable

• constant

• independent variable

• control group

Five students each used the same ruler to measure the length of the same pencil. Their measurements were: 15.33 cm, 15.34 cm, 15.33 cm, 15.33 cm, 15.34 cm. The actual length of the pencil was 15.85 cm. Were the students’ measurements accurate, precise, both, or neither?

• Accurate

• Precise

• Both

• Neither

Identify the independent and dependent variables in the hypothesis: "If a player practices longer, then he will score more points in the game."

• Independent: practice time; Dependent: game score

• Independent: game score; Dependent: practice time

• Independent: player; Dependent: game

• Independent: game; Dependent: player

Which particles determine the identity of an element?

• Protons only

• Neutrons only

• Neutrons and protons

• Protons and electrons

Which of the following terms represents the smallest part of an element that still has the properties of that element?

• Cell

• Matter

• Atom

• Molecule

Life can exist under frozen surfaces in polar seas because...

• Water is less dense as a solid.

• Water has a high surface tension.

• Water is a terrific solvent.

• Water has a high specific heat.

An atom is electrically neutral because...

• Neutrons balance the protons and electrons.

• Nuclear forces stabilize the charges.

• The numbers of protons and electrons are equal.

• The numbers of protons and neutrons are equal.

Tags

NGSS.HS-PS1-7

The nucleus of an atom has all of the following characteristics EXCEPT that it...

• Is positively charged

• Contains nearly all of the atom’s mass

• Is very dense

• Contains nearly all of the atom’s volume

Tags

NGSS.HS-PS1-8

Atoms of elements in the same group of the periodic table share the same...

• Number of energy levels

• Atomic numbers

• Number of valence electrons

• Atomic masses

Tags

NGSS.HS-PS1-1

The most important element necessary for life that makes up EVERY macromolecule is...

• Hydrogen

• Nitrogen

• Carbon

• Oxygen

Tags

NGSS.HS-LS1-6