NS term 4

Question 1

solar energy

Answer 1

energy from the sun

Question 2

axis

Answer 2

imaginary line running through the center of earth, from the north pole to the south pole

Question 3

titled

Answer 3

at an angle, not straight

Question 4

rotation

Answer 4

spinning movement around an axis

Question 5

hot objects radiate what

Answer 5

light and heat

Question 6

earth recives solar energy in the form of ?

Answer 6

heat and light

Question 7

solar intensity

Answer 7

amount of solar energy per unit area that reaches a place

Question 8

tilt of axis/hemisphere affects what

Answer 8

the angle at which solar radiation hits earth

Question 9

hemisphere tilted more towards the sun = ?

Answer 9

sun hits more directly

Question 10

hemisphere tilted away from the sun = ?

Answer 10

sun hits more obliquely

Question 11

when is the solar energy more intense in an area

Answer 11

its more intense when the rays hit directly

Question 12

solar energy = less intense/oblique = ?

Answer 12

area is colder

Question 13

solar energy = more intense/ hits directly = ?

Answer 13

area is warmer

Question 14

differing intensities reaching hemispheres = ?

Answer 14

causes the 4 seasons

Question 15

in dec. when the solar energy falls directly on the southeren hemisphere, what season is it there

Answer 15

summer

Question 16

In dec. when solar energy falls obliquely on the NH, what season is it there

Answer 16

winter

Question 17

length of day changes depending on ?

Answer 17

depending on the season

Question 18

circle of illumination

Answer 18

line dividing the lit half from the dark half of earth

Question 19

what is the result of earth rotating on its axis

Answer 19

• 1/2 of the earth faces the sun ( daytime )
• other 1/2 faces away from the sun ( night time )

Question 20

we need solar energy to carry out ?

Answer 20

life fuctions

Question 21

what does photosynthesis require

Answer 21

• carbon dioxcide from air
• light energy from sun
• water from soil

Question 22

what happens during photosynthesis

Answer 22

• leaves make glucose
  ( energy rich sugar )
• oxygen is released into the air

Question 23

glucose

Answer 23

food plants use to fuel all their life processes

Question 24

herbivores

Answer 24

animals that only eat plants

Question 25

carnivores

Answer 25

animals that only eat meat

Question 26

omnivores

Answer 26

animals that eat both plants and meat

Question 27

herbivores are ____________ ___________ on plants

Answer 27

directly dependent

Question 28

carnivores are ____________ ________ on plants

Answer 28

indirectly independent (bc they eat animals that eat plants)

Question 29

fossils

Answer 29

remains of plants and animals that lived long ago

Question 30

swamps

Answer 30

wetlands in which tall trees and other plants grow

Question 31

fossil fuels

Answer 31

coal, oil and gas made from the remains of plants and animals that lived long ago

Question 32

what is step 1 in making fossil fuels

Answer 32

remains of plants and animals are depostied under water, there they begin to decay

Question 33

what is step 2 in making fossil fuels

Answer 33

layers of soil and mud form on top and press down on the remains

Question 34

what is step 3 in making fossil fuels

Answer 34

more layers are added, which increases the pressure on top oof the fossil fuels. Loads of pressure added, changes it into oil gas or coal

Question 35

reserves

Answer 35

unused amounts of fossil fuels and minerals in the ground

Question 36

geologists

Answer 36

scientist that study earths physical structure

Question 37

what is fracking

Answer 37

* deep holes are drilled and explosives are used to break up the rock * large amounts of water and chemicals are used to release the gas

Question 38

why are some people against fracking

Answer 38

* say karoos cant afford its water to be used for fraking * fear chemicals will make ground water unsafe to drink * wild + domestic animals + crops will die * say gas will run out after 15 yrs leaving the land spoilt

Question 39

phases of the moon

Answer 39

shapes of the lit part of the moon as seen by an observer on earth

Question 40

how many days does it take for the moon to orbit around earth

Answer 40

29, 5 days

Question 41

how many phases of the moon are there

Answer 41

8

Question 42

what are the phases of the moon in order

Answer 42

1. new moon 2. waxing cresent 3. first quater 4. waxing gibous 5. full moon 6. waning gibous 7. last quarter 8. waning cresent repeat

Question 43

gravity

Answer 43

tendency of all objects to attract towards each other because of mass

Question 44

mass

Answer 44

amount of matter in an object

Question 45

gravity depends on

Answer 45

mass and distance

Question 46

sun gravitional pull does what

Answer 46

keeps everything moving around it

Question 47

the closer objects are = ?

Answer 47

the stronger the pull / the pulls strength increases

Question 48

the futher apart objects are = ?

Answer 48

the weaker the pull / the pulls strenght decreases

Question 49

astronuat

Answer 49

person who travels into space

Question 50

tides

Answer 50

predictable daily rise and fall of the ocean and sea levels

Question 51

level high

Answer 51

high tide

Question 52

level low

Answer 52

low tide

Question 53

the moon gravitational pull on earth effects what

Answer 53

effects the earths oceans and seas

Question 54

how many high tides and low tides are there a day

Answer 54

2

Question 55

spring tide

Answer 55

tide, when high tide is extra high and low tide is extra low

Question 56

when does a spring tide happen

Answer 56

when the sun, moon and earth are aligned/ in alignement

Question 57

intertidal zones

Answer 57

area of a shoreline that lies between the high tide line and low tide line

Question 58

kelp

Answer 58

large kind of seaweed that grows mostly in cold water

Question 59

what is a source of food for the living things in the intertidal zone

Answer 59

plankton that high tide brings in

Question 60

orbit

Answer 60

fixed path an object in space travels in as it revoles around another object

Question 61

revolution

Answer 61

movement of an object in space around another

Question 62

earth revoles around the sun once every ?

Answer 62

365 1/4 days

Question 63

which way does the earth revole around the sun

Answer 63

anti - clockwise