Science yearly

Question 1

What are the contact forces?

Answer 1

friction, buoyancy, and air-pressure

Question 2

What are the two categories of forces?

Answer 2

Contact force, and non-contact forces

Question 3

What are the non-contact forces?

Answer 3

Gravity, magnesium, and electrostatic.

Question 4

What are balanced forces?

Answer 4

The forces are balanced, an even pull on each end, therefore it can’t be moving or going anywhere.

Question 5

What are un-balanced forces?

Answer 5

The forces are unbalanced, the pull on each side are not equal, making the object move in the direction of the strongest pull.

Question 6

What is friction?

Answer 6

The force of two objects rubbing up against each other, friction slows down or stops movement.

Question 7

Why is friction good?

Answer 7

-allows us to walk
-allows us to sit in a chair
-drive safely
-allows us to stand
-slows down movement.

Question 8

Why is friction bad?

Answer 8

-if pushing something heavy, friction makes it harder.
-friction causes heat
-friction is bad for car engine because we have to add oil to reduce the heat from friction.

Question 9

What is static electricity?

Answer 9

Stationary electrical charge that builds up on the surface of a material.

Question 10

What is matter made up of?

Answer 10

Atoms- atoms contain particles that have charges.

Question 11

Does a proton have a negative or a positive charge?

Answer 11

A proton has a positive charge

Question 12

Does an electron have a negative or a positive charge?

Answer 12

An electron has a negative charge.

Question 13

What does magnets mean?

Answer 13

any material capable of attracting iron and producing a magnetic field

Question 14

What is a magnetic field?

Answer 14

An area around a magnet that has a force that attracts objects to itself.

Question 15

What is the difference of a permanent and temporary magnet?

Answer 15

A permanent magnet retains its magnetic properties for a long time, but a temporary magnet act like permanent ones when in a strong magnetic field.

Question 16

What are the seven different forces?

Answer 16

1. weight
2. reaction (type A)
3. reaction (type B)
4. Thrust
5. Friction
6. Uplift
7. Upthrust

Question 17

What is the force of weight?

Answer 17

Gravity acting downwards on an object.

Question 18

What is the force of reaction (type A)?

but gl bc idk

Answer 18

The force of ground holding something up

Question 19

What is the force of reaction (type B)?

Answer 19

The force of an object pushing back up against you.

Question 20

What is the force of thrust?

Answer 20

The force of pushing something forward.

Question 21

What is the force of friction?

Answer 21

The force acting against any movement.

Question 22

What is the force of uplift?

Answer 22

The force that lifts things up in air.

Question 23

What is the force of upthrust?

Answer 23

The force of water pushing upwards.

Question 24

What does ‘pull’ do?

Answer 24

keeps objects apart, or moves them apart

Question 25

What does 'push' do?

Answer 25

keeps objects together, or moves them closer.

Question 26

What does 'twist' do?

Answer 26

makes things turn.

Question 27

What can forces do?

Answer 27

-change the shape of an object -change or stop movement of an object -or do both

Question 28

What does a force do when it changes the motion of an object?

Answer 28

-make an object start moving or go faster -make an object slow down or stop -change the direction its moving -change the way its spinning -sometimes all at the same time.

Question 29

What type of field does earth have?

Answer 29

a gravitational field

Question 30

What type of field does static electricity have?

Answer 30

An electrical field

Question 31

What type of field do magnets have?

Answer 31

a magnetic field

Question 31

What type of field do magnets have?

Answer 31

a magnetic field

Question 32

Is gravity a contact or non-contact force?

Answer 32

gravity is a non-contact force

Question 33

What is gravity?

Answer 33

The force that attracts the earth and an object towards each other.

Question 34

How do we know if something is living?

Answer 34

Mrs Gren

Question 35

What is Mrs Gren?

Answer 35

Mrs Gren stands for: Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition

Question 36

What is movement?

Answer 36

to change positions

Question 37

What is respiration?

Answer 37

produces energy from food

Question 38

What is sensitivity?

Answer 38

To detect changes in the surroundings, using the five senses.

Question 39

What is growth?

Answer 39

to increase in size

Question 40

What is reproduction?

Answer 40

To create new organisms

Question 41

What is excretion?

Answer 41

Remove wastes inside the body.

Question 42

What is nutrition?

Answer 42

the process of providing or obtaining the food necessary for health and growth.

Question 43

Why do we classify?

Answer 43

classifying living things is important to help us organise and make sense of the diverse organisms on earth.

Question 44

What are characteristics of mammals?

Answer 44

- have a backbone -constant body temperature (endotherm) - Females have mammary glands that produce milk- all mammal babies feed on milk -skin or fur

Question 45

What are characteristics of birds?

Answer 45

- have a backbone -skin with feathers - most can fly - eggs with a hard shell - a beak for feeding - constant body temperature (endotherm)

Question 46

What are characteristics of reptiles?

Answer 46

- have a backbone - skin with scales - eggs with a leathery shell - lungs for breathing (on land) - changing body temperature (ectotherm)

Question 47

What are characteristics of amphibians?

Answer 47

- have a backbone - soft moist skin without scales - eggs with no shell, usually laid in water - adults usually live on land and have lungs - changing body temperature (ectotherm)

Question 48

What are characteristics of fish?

Answer 48

- have a backbone - only live in water - have gills for breathing underwater - lay eggs without a shell - skin with scales - have a changing body temperature (ectotherm)

Question 49

What are vertebrates?

Answer 49

Fish, mammals, amphibians, reptiles, and birds.

Question 50

What are the invertebrate's?

Answer 50

to complete

Question 51

What are the five plants?

Answer 51

- mosses - ferns - conifers -grasses - flowering plants

Question 52

What are classifications of mosses?

Answer 52

-live in damp places - thin leaves that lose water - no proper roots or stem - make tiny spores

Question 53

What are classifications of ferns?

Answer 53

- strong stems -roots and leaves - waxy layer (cuticle) to reduce water loss) -have tubes called xylem - release spores

Question 54

What are classifications of conifers?

Answer 54

- many are evergreen, keeping their leaves throughout the entire year - leaves are needle shaped - make male and female cones

Question 55

What are classifications of flowering plants?

Answer 55

- flowers contain reproductive organs - flowers make seeds after fertilization - live in dry and hot places

Question 56

What are keys?

Answer 56

a key is a tool that allows the user to determine and identify items in the natural world.

Question 57

What does dichotomous mean?

Answer 57

"divided into two parts"

Question 58

How do dichotomous keys work?

Answer 58

Dichotomous keys always give two choices in each step, to finally break down a group into you get it's proper classification.

Question 59

What are classification keys also known as?

Answer 59

Dichotomous keys, and vice versa for classification keys.

Question 60

What is an ecosytem?

Answer 60

a biological community of interacting organisms and their physical environment.