Unit 1 TEST study guide (Chp. 1 &2)

Kilo, Heta, Deka, Basic unit, Deci, Centi, Milli

• measuring system

• metric system

• not a system

• basic units in math

Answer explanation

The terms Kilo, Heta, Deka, Basic unit, Deci, Centi, and Milli are all prefixes used in the metric system to denote different powers of ten, making 'metric system' the correct choice.

A solution is a(an)

• combination of isotopes.

• chemical reaction.

• evenly distributed mixture of two or more substances.

• combination of two or more liquids.

Answer explanation

A solution is an evenly distributed mixture of two or more substances.

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group

• control group

• data

• variables

Answer explanation

The control group is the part of the experiment that does not receive the variable being tested, serving as a baseline for comparison against the experimental group, which does receive the variable.

The parrots range from bright green to dark red.

• Qualitative

• Quantitative

Answer explanation

The description of the parrots' colors (bright green to dark red) refers to their qualities, making it a qualitative observation. Quantitative would involve numerical data, which is not present here.

Maintaining a stable internal

environment is called

• homeostasis

• equilibrium

• balance

• evenness

Answer explanation

Maintaining a stable internal environment is known as homeostasis. This term specifically refers to the processes that organisms use to regulate their internal conditions, ensuring optimal functioning despite external changes.

An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. What is the independent variable in the experiment?

• the amount of light

• plant in the closet

• growth of the plants

• the amount of water

Answer explanation

The independent variable is the factor that is changed in an experiment. In this case, the amount of light each plant receives is varied (full sunlight, shaded, unlit), making 'the amount of light' the independent variable.

Which of the following are the properties or qualities that distinguish living organisms from non-living things?

• DNA

• Theories

• Biology

• Characteristics of life

Answer explanation

The correct choice, 'Characteristics of life', refers to the essential traits that define living organisms, such as growth, reproduction, and response to stimuli, distinguishing them from non-living things.

Which of the following characteristics of living things best explains why your legs and arms get longer and stronger as you get older? 

• living things respond to their environment

• living things maintain internal balance

• living things are made of cells

• living things grow and develop

Answer explanation

The correct choice is 'living things grow and develop' because as you age, your body undergoes growth and development, leading to longer and stronger arms and legs.

Name the protein monomer.

• monosaccharide

• nucleotide

• phospholipid

• amino acid

Answer explanation

The protein monomer is an amino acid. Amino acids are the building blocks of proteins, while monosaccharides are for carbohydrates, nucleotides for nucleic acids, and phospholipids for cell membranes.

What is the most common solvent in everyday life?

• Ethanol

• Tuluene

• Water

• Oils

Answer explanation

Water is the most common solvent in everyday life due to its abundance and ability to dissolve many substances, making it essential for various biological and chemical processes.