natural science

Question 1

example of a fossilfeuls

Answer 1

coal

Question 2

main supplier of electricity

Answer 2

eskom

Question 3

largest planet in the solar system

Answer 3

jupiter

Question 4

does not allow electricity

Answer 4

insulator

Question 5

allows electricity to go through

Answer 5

conductor

Question 6

battery has stored energy that is converted into _

Answer 6

electrical energy

Question 7

patterns of stars are called_

Answer 7

constellations

Question 8

_ draws the sun and earth together

Answer 8

gravity

Question 9

the sun rises _ in the morning

Answer 9

east

Question 10

axels must be _ for a cart to drive straight

Answer 10

parallel

Question 11

a wooden spoon is a good conductor

Answer 11

false

Question 12

it is not safe during a lightning storm under a tree

Answer 12

True

Question 13

illegal connections are dangerous and unsafe

Answer 13

true

Question 14

the sun is a solid and formed by stone

Answer 14

false

Question 15

the moon cannot generate its own light

Answer 15

true

Question 16

all the planets in order

Answer 16

mercury, venus, earth, mars, jupiter, saturn, uranus, neptune

Question 17

name 3 examples of a fossil feul

Answer 17

1 coal, 2 oil, 3 natural gas

Question 18

how is coal formed

Answer 18

as plants died, they sank to the bottom of the swamps. over the years, thick layers of plants were covered by dirt and water, after a long time, the heat and pressure changed the plants into coal

Question 19

two main factors which turned the remains of organisms into fossil feuls

Answer 19

1 heat and pressure
2 time and lack of oxygen

Question 20

Discuss three components that need a electrical component need to contain

Answer 20

a source of energy, such as a battery
conducting material, such as electric wires
a device that transfers the energy for a useful purpose , like a light

Question 21

discuss three componets that a simple electrical componets needs to contain

Answer 21

1 a source of energy such as a battery
conducting material, such as the electric wires
a device that transfers the energy for a useful purpose, a light

Question 22

discuss the difference between renewable and non-renewable energy sources and give and example for each

Answer 22

renewable sources
-solar energy- derived from the sun
-wind energy- generated by wind
low enviromental impact
non-renewable
-coal- a fossil feul formed by decomposed plant matter
-oil- extracted from underground
both a reliable, high density energy source

Question 23

discuss the reason why the energy source (solar) will be able to generate better than some places

Answer 23

solar uses sun, so a place that has more sunlight through out the year will produce more energy. other places that barley has sun wont get effcient energy

Question 24

give 3 characteristics of planet earth

Answer 24

about 71% of earths surface is covered by water
earth has a diverse atmosphere composed mainly of nitrogen (78%) and oxygen (28%)
earth is home to a vast array of ecosystems and species

Question 25

how does hydro power work

Answer 25

hydro power works when water is released through a turbine connected to a generator that produces electricity

Question 26

give 2 characteristics of jupiter

Answer 26

jupiter is the largest planet in our solarsystem, with a diameter of about 86,881 miles
Jupiter is known for its great red spot

Question 27

what are the inner planets called

Answer 27

mercury
venus
earth
mars

Question 28

what are the outer planets called

Answer 28

jupiter
saturn
uranus
neptune