Y7 Flashcards
What part of the cell contains genetic material?
Nucleus
Which structure allows materials to move in and out of a cell?
Cell membrane
Where does respiration happen in cells?
Mitochondria
What is the jelly-like substance inside cells where reactions happen?
Cytoplasm
True or False: Only plant cells have cell membranes.
False
Which organelle contains chlorophyll?
Chloroplasts
What are the three states of matter?
Solid, liquid, gas
What is the name of the process where a gas becomes a liquid?
Condensation
What happens to particles when a solid melts?
They move faster and spread out
Which state of matter has the most energy?
Gas
True or False: Particles in a solid are arranged randomly.
False
What state of matter takes the shape and volume of its container?
Gas
What is the unit of force?
Newton (N)
What instrument is used to measure force?
Newton meter (spring balance)
What force slows things down when they move?
Friction
A spring stretches 4 cm when a weight is added. What force is acting?
Gravity
True or False: Friction can be useful and harmful.
True
What energy transformation happens when a light bulb is turned on?
Electrical energy to light and heat energy
What is the system called for naming species?
Binomial naming system
Write the full binomial name for a human.
Homo sapiens
What kingdom does a mushroom belong to?
Fungi
What is the main difference between vertebrates and invertebrates?
Vertebrates have backbones, invertebrates do not
Which group of animals lays eggs and has scales?
Reptiles
True or False: All living things can move.
True
What is a conductor?
A material that allows electricity or heat to flow
What material property means ‘can be stretched into wire’?
Ductile
Which property means it breaks easily when force is applied?
Brittle
Name one use of a material with high thermal conductivity.
Cooking pans
True or False: All plastics conduct electricity.
False
Why is copper used in electrical wires?
Because it conducts electricity well and is ductile
What causes day and night?
The rotation of the Earth
How long does it take the Earth to orbit the Sun?
1 year (365 days)
What is gravity?
A force that pulls objects towards each other
True or False: The Moon produces its own light.
False
What is the name for when the Moon blocks sunlight from reaching Earth?
Solar eclipse
Name the force that keeps the planets in orbit.
Gravity
What do we call organisms that make their own food?
Producers
What is a consumer?
An organism that eats other organisms
Name one example of a decomposer.
Fungi or bacteria
In a food chain, what comes after the producer?
Primary consumer
True or False: Arrows in a food chain show the direction of energy flow.
True
What type of change is melting — physical or chemical?
Physical
Name a sign that a chemical reaction has happened.
Colour change, gas produced, temperature change
What gas is produced when acid reacts with metal?
Hydrogen
Is freezing water a reversible or irreversible change?
Reversible
True or False: Burning wood is a physical change.
False
What happens to mass in a closed system during a chemical reaction?
It stays the same (conservation of mass)
What is the unit of current?
Ampere (A)
What is needed to complete an electric circuit?
A power source, wires, and a closed path
