Physical science quiz number 1

Question 1

What is science ?

Answer 1

It is a system of knowledge and methods to find knowledge

Question 2

Why is science exiting

Answer 2

Because you’ll never know what you will find

Question 3

How does science begin and end

Answer 3

Science begins with curiosity and ends with discovery

Question 4

What methods are ways to achieve answers in science

Answer 4

Observing and measuring

Question 5

What are technology and science together

Answer 5

They’re interdependence advances in one lead to advances in the other

Question 6

Which are the branches of science

Answer 6

Science study is divided into social Anne natural science
Then there’s physical science and biology and chemistry

Question 7

What are the two main areas of physical science

Answer 7

Chemistry: study of composition, Structure,properties and matter
Physics:study of matter and enegry

Question 8

The 3 divisions of natural science

Answer 8

Physical
Earth
And space science

Question 9

What is the problem with subdividing science

Answer 9

That the different areas often overlap one another example much of biology is chemistry and chemistry is physics

Question 10

What is the scientific method

Answer 10

It’s an organized plan for gathering information

Question 11

What is the goal of the scientific method

Answer 11

It is to solve and better understand a problem

Question 12

The steps to the scientific approach

Answer 12

1 observation: information you obtain from you obtain from your sense
2 hypothesis: a proposed answer to a question for it to be useful it. Just be testable
3 testing hypothesis: it is to test the variables changes if they’re kept constant or controlled
4 record data : based on the data you make conclusions
If the data does not support the hypothesis the scientist must make a new one
5 making a theory: once the steps have been successfully completed a theory is an well tested explanation

Question 13

Why is it important to follow safety precaution in laboratory

Answer 13

Because there are dangerous items

Question 14

The most important rule for safety

Answer 14

Follow teachers rule

Question 15

What is a pure substance

Answer 15

Matter that has the same composition
Examples table salt and sugar

Question 16

What are the two categories substances fall into

Answer 16

Elements and compounds

Question 17

What are elements

Answer 17

Substance that cannot be Brocken into simpler substances there’s is 1oo elements
And element is fixed composition because it only has one atom

Question 18

Example of elements

Answer 18

Iron copper silver gold hydrogen oxygen carbon and nitrogen

Question 19

Swedish chemist that assigned symbols to elements in the year 1813

Answer 19

Jon Berzelius

Question 20

How do symbols make it easier for scientist to communicate

Answer 20

The allow for scientist that’s peak different languages to speak with no confusion and symbols are made of letters one or two first one is always capitalized

Question 21

What is a compound

Answer 21

Substances made out of two or more simple substances and can be Brocken into simpler ones

Question 22

What is a mixture and what are the two kinds

Answer 22

Mixtures tend to have some of the properties of their individual substances but are less constant they can be classified as heterogenous mixture and homogeneous mixtures

Question 23

What is is a heterogeneous and homogeneous mixture

Answer 23

Heterogeneous mixtures parts are different and can be notified and homogeneous mixtures are barely distinguished because the substance is evenly distributed

Homogeneous mixtures seem to have one substance

Question 24

Example of heterogeneous and homogeneous mixtures

Answer 24

Heterogeneous
Oil and water
Homogeneous
Sugar water

Question 25

How can a mixture be classified

Answer 25

By the size of the largest particle and the classification are
Solution suspension colloids

Question 26

What is a solution

Answer 26

When a substance dissolves into a homogeneous mixture it is a solution

Question 27

What is a suspension

Answer 27

Heterogeneous mixture with layers over time

Question 28

What is a colloid

Answer 28

It contains intermediate particles between the small ones in a solution It cannot separate into layers

Question 29

Which are the physical properties of materials

Answer 29

Viscosity
Malleability conductivity
Boiling point
Melting point and
Density