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year 9 Science Homework Week 7
By Naomi Arthur
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Last updated over 4 years ago
15 questions
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Question 1
1.
In which state of matter are the particles in a regular arrangement?
solids
liquids
gases
Question 2
2.
Which two states of matter cannot be compressed?
Solids and gas
Liquids and solids
Gases and liquids
Question 3
3.
What will cause particles to gain more energy?
Increase in temperature
Decrease in temperature
No change in temperature
Question 4
4.
What is a molecule?
Two or more atoms are chemically joined
One atom chemically joined
Two or more elements chemically joined
Question 5
5.
How many oxygen atoms are there in O3?
1
2
3
Question 6
6.
What is a compound?
two or more atoms chemically joined together
two or more different elements chemically joined together
Two or more molecules chemically joined together
Question 7
7.
What is a pure substance?
A substance that consists of a mixture of elements
A substance that consists of a mixture of atoms
A substance that consists of only one element or compound
Question 8
8.
Who’s model described an atom as a solid sphere?
rutherford
thompson
dalton
Question 9
9.
What was discovered that led Thompson to change the atomic model?
Positive Protons
Neutral neutrons
Negative electrons
Question 10
10.
What does the plum-pudding model show?
Positively-charged protons embedded in a sphere of negative charge
Negatively-charged electrons embedded in a sphere of positive charge
Negatively-charged neutrons embedded in a sphere of positive charge
Question 11
11.
If the plum-pudding model was accurate what would have happened in the alpha-particle scattering experiment?
All the alpha particles should have passed directly through the gold foil
All the alpha particles should have been deflected
All the alpha particles should have been reflected straight backwards
Question 12
12.
What is the relative mass of protons and neutrons?
1
0
-1
Question 13
13.
What is the relative charge of electrons?
+1
0
-1
Question 14
14.
What is the relative charge of protons?
+1
0
-1
Question 15
15.
How many protons does oxygen have?
8
16
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