Science Random Questions

Question 1

what is mass

Answer 1

the amount of stuff in it or how tightly the atoms or molecules are packed together

Question 2

what is mass measured in

Answer 2

grams (g) or kilograms (kg)

Question 3

how do you find mass

Answer 3

electronic balance

Question 4

which has a higher density silver or gold

Answer 4

silver

Question 5

what is density

Answer 5

how tightly packed together items are

Question 6

what do you need to get density

Answer 6

1. the mass in grams

2. the volume in cm³

Question 7

equation for density

Answer 7

mass in grams ÷ volume

Question 8

mdv triangle

Answer 8

M

D V

Question 9

what are the functions of food

Answer 9

prevention of disease, energy, growth & repair

Question 10

what are the 6 types of food

Answer 10

1. carbohydrates
2. fats
3. protein
4. vitamins
5. minerals
6. water

Question 11

what are the 3 types of carbohydrates

Answer 11

1. sugars
2. starch
3. fibre

Question 12

what does sugar do

Answer 12

a fast supply of energy. eg. sweets, fruit, honey

Question 13

what does starch do

Answer 13

slow supply of energy eg. bread, rice, pasta, potatoes

Question 14

what does fibre do

Answer 14

helps move food through the intestines eg. cereals, brown bread, fruit and vegetables.

Question 15

what does protein do

Answer 15

makes muscle, hair, hormones. eg. meat, fish, egss, cheese, nuts, peas, beans.

Question 16

what does fat do

Answer 16

may supply energy, stores food and insulates the body. eg. butter, cream, milk, margarine

Question 17

what does vitamin c do

Answer 17

keeps skin and gums healthy

Question 18

what does vitamin d do

Answer 18

helps form strong bones

Question 19

what does iron do? (a mineral)

Answer 19

forms part of red blood cells. eg. red meat and green vegetables

Question 20

what does calcium do? (minerals)

Answer 20

forma strong bones found in milk, cheese, yoghurt

Question 21

food portions depend on

Answer 21

age, gender, activity levels, health

Question 22

what is energy measured in

Answer 22

kilocalories (kcals) and kilojoules (kj)

Question 23

what is used to test for starch and what color change when positive

Answer 23

iodine

blue - black

Question 24

what is used to test for fat and what color change when positive

Answer 24

brown paper

turns transparent

Question 25

what is used to test for protein and what color change when positive

Answer 25

biruet solution

blue - violet

Question 26

what is used to test for reducing sugars and what color change when positive

Answer 26

Benedicts solution + heat

blue - brick red