YEAR 7
Lesson: Elements, Metals and Non-metals
Complete the following exercise.
1. Identify each element as a metal, non-metal or metalloid.
a) Copper:
e) Oxygen:
b) Boron:
f) Aluminium
c) Silicon
g) hydrogen
d) calcium
h) polonium
2. Using the periodic table provided above, identify the following symbol for these elements:
a) Lithium:
e) Bromine:
b) Nitrogen:
f) Nickel:
c) Chlorine:
g) Sodium:
d) Zinc:
h) Sulphur:
e) Magnesium:
i) Phosphorus:
3. List four physical properties of metals and non-metals.
4. Identify the atomic number of the following elements below
Atomic
symbol
Atomic
number
Atomic
Mass
B
Na
5
10.8
Ga
Y
Cu
Tc
Pb
K
YEAR 7
Lesson: Tension and Upthrust
1. Complete the sentences using the key word below.
Sinks
float
rises
a) When weight is greater than upthrust, the object……………… in the liquid
b) When weight is equal to upthrust, the object…………………… in the liquid
c) When weight is less than upthrust, the object ……………….in the liquid
2. Name the forces acting on the following objects
Upthrust
friction
gravity
……………………
…………………….
…………………..
3. When two forces act in opposite directions to each other, they produce an overall force called a
resultant force. This can be shown in the diagram.
Complete the following diagrams to show how two opposite forces form a resultant force.
a)
b)
c)
4. The car in the diagram has two horizontal forces on it. It is initially travelling forward at 12 m/s.
a) Name the force that acts against the motion of the car
b) Describe the motion of the car over the next few seconds due to horizontal forces on it.
c) Explain your reason for why you think the car will behave like this.