Ch 1 sec 1-4

Question 1

Technology

Answer 1

The application of science for practical purposes; the use of tools, machines, materials, and processes to meet human needs.

Question 2

Compound light microscope

Answer 2

An instrument that magnifies small objects so that they can be seen easily by using two or more lenses.

Question 3

Electron microscope

Answer 3

A microscope that focuses a beam of electrons to magnify objects

Question 4

Volume

Answer 4

A measure of the size of a body or region in three-dimensional space

Question 5

Area

Answer 5

A measure of the size of a surface or a region

Question 6

Mass

Answer 6

Is a measure of the amount of matter in an object

Question 7

Temperature

Answer 7

A measure of how hot (or cold) something is

Question 8

Life science

Answer 8

The study of living things

Question 9

Scientific methods

Answer 9

A series of steps followed to solve problems

Question 10

Hypothesis

Answer 10

An explanation that is based on prior scientific research or observations and that can be tested

Question 11

Controlled experiment

Answer 11

An experiment that tests only one factor at a time by using a comparison of a control group with an experimental group

Question 12

Variable

Answer 12

A factor that changes in an experiment in order to test a hypothesis

Question 13

Model

Answer 13

A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept

Question 14

Theory

Answer 14

An explanation that ties together many hypotheses and observations

Question 15

Law

Answer 15

A summary of many experimental results and observations; a law tells how things work

Question 16

Use life science and scientific method in a sentence

Answer 16

Life scientists use life science to develop scientific methods

Question 17

Use the following terms in a sentence: controlled experiment and variable

Answer 17

There are not a lot of variables in controlled experiments.

Question 18

How does a theory differ from a hypothesis?

Answer 18

A theory is a wide range of explanations and a hypothesis is a prediction

Question 19

Compare a compound light microscope from an electron microscope?

Answer 19

A compound light microscope can magnify objects with two lenses so it can be seen easily. Vs an electron microscope can focus on a beam of electrons to magnify objects

Question 20

Compare area to volume, how do they differ?

Answer 20

Area is length times width of a polygon. Volume is a 3 dimensional measurement

Question 21

The steps of scientific methods often start with __ _____________.

Answer 21

A question

Question 22

A control group is compared with one or more experimental groups with what type of experiment?

Answer 22

Controlled

Question 23

What is the best tool for measuring 100mL of water?

Answer 23

150 mL graduated cylinder

Question 24

Which of the following is NOT an SI unit?

1) meter
2) foot
3) liter
4) kilogram

Answer 24

Foot

Question 25

A pencil is 14cm long. How many millimeters would that be?

Answer 25

140mm

Question 26

List three ways that science is beneficial to living things?

Answer 26

1) science can be used to find cures for diseases
2) to understand d animal behavior
3) solve environmental problems

Question 27

Why do hypotheses need to be testable?

Answer 27

In order to be useful

Question 28

Give an example of how a life scientist might use computers and technology.

Answer 28

A life scientist studying animals might use a radio collar

Question 29

List 3 types of models, and give an example of each.

Answer 29

1) Physical-model of a cell
2) mathematical- Punnett square
3) conceptual- Big Bang theory

Question 30

What are some advantages and limitations of models?

Answer 30

Easier to see and manipulate, but it can’t work like the real thing

Question 31

Which SI units can be used to describe the volume of an object? Which SI units can be used to describe the mass of an object?

Answer 31

Volume equals liters

Mass equals grams; and kilograms

Question 32

In a controlled experiment, why should there be several individuals in the control group and in each of the experimental groups?

Answer 32

So they can help each other if they don’t understand. More individuals in the room the more confident they could be.

Question 33

Investigations often begin with observation. What limits are there to the observations that scientists can make?

Answer 33

Observations are limited to human senses and technology