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WorksheetsChemical Reactions and Properties (REACTION OF METALS WITH WATER
Total questions: 29
Worksheet time: 15mins
What happens in a chemical reaction?
The substance stays the same
A new substance is formed
It only changes shape
The substance disappears
Which of these is a sign of a chemical reaction?
Change in size
Formation of gas or bubbles
Freezing of water
Breaking into pieces
What do we call the substances that react in a chemical reaction?
Reactants
Products
Elements
Metals
Rusting is an example of a chemical reaction. What do iron and oxygen form when they react?
Silver
Water
Rust
Sand
What type of reaction happens when a candle burns?
Physical change
Melting reaction
Chemical reaction
Freezing reaction
What does the periodic table show?
A list of all known elements
All types of mixtures
A collection of metals only
A group of chemicals for experiments
Which element is known as the lightest?
Oxygen
Carbon
Hydrogen
Iron
Which of these is a metal?
Oxygen
Iron
Helium
Neon
What is the symbol for oxygen?
Ox
O2
O
Oy
Which of the following is NOT an element?
Water
Gold
Silver
Copper
Why should we wear safety goggles in the lab?
To look cool
To protect our hands
To protect our eyes
To see better
What should you do if a chemical spills in the lab?
Wipe it with your hand
Inform the teacher immediately
Leave it and walk away
Smell it to check what it is
Why is it important not to eat or drink in the lab?
Because food might taste bad
To avoid chemical contamination
Because it is too noisy
Because we must focus on writing
What should you do before starting an experiment?
Run around the lab
Listen to the teacher's instructions
Start mixing chemicals randomly
Eat a snack
Where should you dispose of broken glass in the lab?
In the regular trash
In a special glass disposal container
In the sink
On the floor
Which of these is a common property of metals?
Brittle
Shiny and good conductors of heat
Poor conductor of electricity
Soft and dull
Which metal is commonly used to make electrical wires?
Gold
Copper
Silver
Mercury
What happens when most metals are exposed to water over time?
They dissolve
They rust or corrode
They disappear
They turn into gold
Which of the following is a liquid metal at room temperature?
Iron
Mercury
Aluminum
Copper
Which of these metals is magnetic?
Gold
Aluminum
Iron
Silver
What are the three main states of matter?
Solid, liquid, and gas
Water, ice, and vapor
Soft, hard, and rough
Metal, wood, and glass
What happens when water is heated to 100°C?
It freezes
It turns into steam
It becomes ice
It turns into metal
Which of these is an example of a gas?
Rock
Water
Oxygen
Ice
When a solid turns into a liquid, what process is happening?
Freezing
Evaporation
Melting
Condensation
Which state of matter has a fixed shape?
Solid
Liquid
Gas
Plasma
What is the main gas we breathe in?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
What happens when ice is left in the sun?
It becomes a solid
It melts into water
It turns into gas immediately
It gets heavier
Which element do plants need for photosynthesis?
Oxygen
Carbon dioxide
Nitrogen
Iron
Which metal is most commonly used to make car bodies?
Gold
Iron
Silver
Aluminum
