Chemical Science Test 2016

Question 1

What is an atom?

Answer 1

The smallest particle of a chemical that can exist

Question 2

What is a compound?

Answer 2

A compound is when you have two or more different elements bonded together

Question 3

What is a molecule?

Answer 3

When two or more atoms are bonded together, they create a molecule

Question 4

What is matter?

Answer 4

Matter is everything around you

Question 5

What is density?

Answer 5

The degree of compactness of a substance

Question 6

What is mass?

Answer 6

A large body of matter that doesn’t have a definite shape

Question 7

What is weight?

Answer 7

A body’s relative mass or quantity of matter contained by it, the heaviness of a person or thing

Question 8

What is volume?

Answer 8

The amount of space that a substance or object occupies

Question 9

What is the ‘ boiling point ‘

Answer 9

The temperature when a liquid boils and turns into a vapour

Question 10

What is a ‘ physical change ‘

Answer 10

The changing of a state of a substance without out changing the chemical make up.

Question 11

What is a ‘ chemical change ‘

Answer 11

Is a change that results in the formation of new chemical substances.

Question 12

What is an element?

Answer 12

Is the simplest type of substance

Question 13

What is plastic/ what does the word mean?

Answer 13

The wood plastic comes from the Greek word plastikos, high means to mould

Question 14

List two advantages of plastic

Answer 14

. They can be easily moulded

. They are very light

Question 15

List two disadvantages of plastic

Answer 15

. Non renewable

. Releases toxic fumes when burnt

Question 16

Who was the inventor of plastic

Answer 16

Leo Baekeland invented plastic in 1904 by mixing two chemicals, phenol and formaldehyde

Question 17

What was plastic called

Answer 17

Bakelite

Question 18

What is the difference between thermoplastics and thermosetting plastics

Answer 18

Thermoplastics have long parallel chains that can slide over each other allowing plastic to bend and stretch. Thermosetting plastics have strong cross-linking bonds, locking them into a giant three dimensional structure.

Question 19

What are three ways we can improve plastic waste

Answer 19

. Use reusable produce bags
. Return reusable containers
. Give up gum( gum had natural rubber in it but now has been replaced so we are all now chewing on plastic that could also be toxic waste)