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End of yr exams - yr 10 > Science - 1 > Flashcards

Science - 1 Flashcards

1
Q

What are 5 laboratory rules?

A

Safety glasses, no running, hair tied up, no eating, no drinking

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2
Q

What is biology?

A

The study of living organisms and how they interact with their environment

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3
Q

What is chemistry?

A

Focuses on the properties and behaviour of matter

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4
Q

What is physics?

A

Studying the relationship of objects, forces, and motions

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5
Q

What is planet earth and beyond?

A

The earth

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6
Q

what is the structure of an atom?

A

The protons and neutrons are in the nucleus, well electrons are surrounding it in the shell

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7
Q

What are the difference between the 3 subatomic particles?

A

Protons have a positive charge
Neutrons have no charge
Electrons have a negative charge

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8
Q

How do you find protons, neutrons, and electrons from the periodic table?

A

Protons and neutrons are found in the atomic number, electrons are atomic number - the mass number

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9
Q

What is an ion?

A

An atom/group of atoms that have an electric charge

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10
Q

What is the role of electrons in chemical reactions/ the ionic bond?

A

Metal elements lose electrons to form positive ions (cations). Non-metal elements gain electrons to form negative ions (anions).

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11
Q

How do you find the atoms in an element?

A

By getting the atomic number

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12
Q

What are reactants?

A

The substance that reacts

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13
Q

What are products?

A

Substance formed as a result of a reaction

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14
Q

What is conserved during a chemical reaction?

A

Matter

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15
Q

Why do you balance an equation?

A

To make sure the law of conservation mass is upheld

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16
Q

Define chemical change:

A

a change causing a new substance

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17
Q

define a compound:

A

substance caused by a chemical bond

18
Q

define element:

A

substance made by a single atom which cannot be broken down

19
Q

define mixture:

A

two or more substances

20
Q

define molecule:

A

smallest unit of substance

20
Q

define physical change:

A

where the physical properties of matter change e.g colour or smell

21
Q

define subatomic particle

A

particle smaller then an atom

22
Q

what are valance electrons?

A

electrons in the outer shell of an atom

23
Q

What is the unit for acceleration?

A

ms-2

24
Q

What is the unit for speed

A

ms-1

25
Q

What is velocity?

A

It tells us how fast something is moving and where it is headed

26
Q

What is an example of a contact force?

A

Friction

27
Q

What is an example of a non-contact force?

A

gravity

28
Q

What is Newtons third law of motion?

A

for every force, there is an equal and opposite force

29
Q

What measures force?

A

force metre

30
Q

What is the difference between mass and weight?

A

Mass remains constant, weight depends on gravity

31
Q

What is Newtons first law of motion?

A

A stationary object will remain stationary unless a force pushes or pulls it.

32
Q

What is Newtons second law of motion

A

The greater the mass, the lower the acceleration

33
Q

What is force acting on an object doing?

A

It is acting in the opposite direction

34
Q

What does energy mean in science?

A

Energy is requied to do work

35
Q

What is energy measured in?

A

Joules (J) of kilojoules (KJ)

36
Q

What is power?

A

Power is the rate which work is done

37
Q

What is power measured in?

A

Watts

38
Q

What are mono and polyatomic atoms?

A

Monoatomic is ions with only 1 type of atom
Polyatomic is ions with more than 1 types of atoms

39
Q

Why elements combine in exact ratios to make electrically neutral compounds

A

Elements combine in exact ratios due to their need for stability. In order for elements to be stable, they need a full valence shell, which can be obtained by forming compounds with other elements.

40
Q

what is an atom?

A

The smallest unit of matter that retains the properties of an element and basic building block of matter

End of yr exams - yr 10 (16 decks)

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