Unit 1 Test

Taking in nutrients and using the resulting energy is a characteristic of living things

Homeostasis is the sum of all the chemical reactions that take place in an organism

Reproduction is not essential to the survival of the individual

Biology is the study of:

Tiny things within cells that keep them alive - [blank_start]organelles[blank_end] Structures that carry out specialized jobs - [blank_start]organs[blank_end] Groups of cells with similar abilities that allow organs to function - [blank_start]tissues[blank_end] Chemical compounds that provide physical structure, allow movement, provide energy use - [blank_start]biological molecules[blank_end]

__________ is the power to show details clearly in an image

_________ is a normal standard against which to compare an experimental group

An educated proposal to explain certain facts; a tentative explanation for an observation or scientific problem that can be tested is called a/an Answer: [blank_start]hypothesis[blank_end]

An attachment between two atoms that have opposite electrical charges which attract each other - [blank_start]ionic bond[blank_end] An attachment between two atoms that share one or more pairs of electrons - [blank_start]covalent bond[blank_end]

Identify X and Y

How many atoms does the molecule O₂ contain?

If an atom is made up of 6 protons, 7 neutrons, and 6 electrons, what is its atomic number

The amount of energy needed for a chemical reaction to begin is called

In the presence of a catalyst the activation energy increases

The liquid state of matter is the state in which atoms have the most energy

Which one of the following is NOT a property of water

[blank_start]Aqueous[blank_end] [blank_start]solutions[blank_end] are solutions in which water is the solvent

Mark which of the following are organic compounds

Store and transfer important information in the cell - [blank_start]nucleic acids[blank_end] Source of energy and structural materials - [blank_start]carbohydrates[blank_end] Store energy, provide insulation, protection - [blank_start]lipids[blank_end] Chains of amino acids that form hair and horns and act as biological catalysts - [blank_start]proteins[blank_end]