Science Term 1A

Question 1

What is the solution between and acid and alkali?

Answer 1

Neutral

Question 2

Acids and Alkalis are chemical opposites? ( True or false )

Answer 2

True

Question 3

Meaning of concentrated

Answer 3

Lots of acid/alkali particles for the amount of water

Question 4

Meaning of dilute

Answer 4

A small number of acid/alkali particles in the same amount of water

Question 5

Meaning of corrosive

Answer 5

Cause burns if they get on your skin

Question 6

The more concentrated the more dangerous ( True or False )

Answer 6

True

Question 7

How do u know if something is more acidic or alkaline ?

Answer 7

Use an indicator

Question 8

Number 7 on the Ph scale is…

Answer 8

Neutral

Question 9

Less than 7 on the pH scale is….

Answer 9

Acidic

Question 10

More than 7 on the pH scale is……

Answer 10

Alkaline

Question 11

When an acid reacts with a metal or compound what is formed ?

Answer 11

Salt and hydrogen ( zinc + sulfuric acid = since sulfate + hydrogen )

Question 12

The hydrogen atoms are replaced with…

Answer 12

Atoms of the metal element

Question 13

A base is a compound that can react with an acid to make a neutral solution what is this called ?

Answer 13

Neutralisation

Question 14

Neutralisation reactions produce….

Answer 14

Water & salt ( acid + base = salt + water )

Question 15

When naming salts what comes first? The metal or acid ?

Answer 15

Metal

Question 16

Hydrochloric acid produces -

Sulfuric acid produces -

Nitric acid produces -

Answer 16

Chloride

Sulfate

Nitrate

Question 17

What are the 7 different types of nutrients?

Answer 17

Carbohydrates

Lipids

Proteins

Vitamins

Minerals

Water

Dietary fibre

Question 18

What does the mouth do in the digestive system?

Answer 18

Food is chewed and mixed with saliva. Teeth helping to break the food.

Question 19

What does the gullet / oesophagus do?

Answer 19

Food passes down the tube

Question 20

What does the stomach do?

Answer 20

Food is mixed with digestive juices and acids

Question 21

What does the small intestine do?

Answer 21

Digestive juices and acids are added by the liver and pancreas the digestion is completed. Nutrients pass through the intestine wall into the bloodstream

Question 22

What does the large intestine do?

Answer 22

Only food that cannot get digested gets this far. Water is passes back into the body, leaving a solid waste of undigested food this is called faeces.

Question 23

What does the rectum do?

Answer 23

Faeces is stored here until they leave the body

Question 24

What does the anus do ?

Answer 24

This is a muscular ring through which faeces pass out of the body

Question 25

Where are carbohydrates digested ?

Answer 25

The mouth, stomach and small intestine

Question 26

Where are proteins digested ?

Answer 26

The stomach and the small intestine. Acids on the stomach help digestion

Question 27

Where are lipids digested

Answer 27

The small intestine. ( Helped by bile )

Question 28

In human reproduction what is the first thing that happens ?

Answer 28

Sperm cells are ejected to the vagina

Question 29

In human reproduction what is the second thing that happens ?

Answer 29

Sperm cells travel through the the female reproductive system to meet an egg

Question 30

In human reproduction what is the third thing that happens ?

Answer 30

ONE sperm cell penetrates the egg cell membrane. The nucleus of the sperm fuses with the nucleus of the egg. This is called FERTILLISATION

Question 31

In human reproduction what is the fourth ( last ) thing that happens ?

Answer 31

The zygote divides several times to form a ball of cells called an embryo ( process called mitosis ) which implants in the uterus lining