Arrange the digestive system organs in the correct order: Large intestine - Small intestine - Stomach - Anus - Oesophagus - Mouth
Mouth (1) Oesophagus (2) Stomach (3) Small Intestine (4) Large Intestine (5) Anus (6)
Which two gases in the atmosphere cause pollution? a) Oxygen b) Nitrogen c) Carbon dioxide d) Sulfur dioxide
C&D
Complete the life cycle of a flowering plant: Germination → __________ → Seed Production → __________
Growth, Pollination
What is the name of the layer of air surrounding Earth? a) Stratosphere b) Atmosphere c) Lithosphere d) Hydrosphere
B
During evaporation, what happens to water particles? a) They become colder and move closer together b) They gain energy and spread out c) They turn into ice d) They stay the same but change color
B
The Arctic fox has special adaptations to survive in the cold. Which two of the following are its adaptations? a) Thick fur for insulation b) Large ears to release heat c) White fur for camouflage in the snow d) Thin body to stay cool
Correct Answer: a & c
Why does stirring help dissolve a solid in water faster?
It spreads the particles around faster.
What happens to the pitch of a sound when a string is stretched tighter? a) The pitch gets lower b) The pitch stays the same c) The pitch gets higher d) The sound disappears
C
Why is dissolving a reversible process? a) The dissolved substance disappears forever b) The dissolved substance can be recovered by evaporation c) The solution changes color permanently d) The solvent is removed by mixing (Correct Answer:
B
What happens to germination time when temperature increases?
It speeds up.
Which two forces act on a sailing boat apart from air resistance, gravity, normal force, and upthrust? a) Friction b) Magnetic force c) Water resistance d) Tension
Correct Answer: a & c
What are the boiling and melting points of water in degrees Celsius? a) 50°C and 0°C b) 100°C and 0°C c) 100°C and 50°C d) 120°C and 20°C
B
Why do humans need a balanced diet?a) To provide energy and nutrients for growth and health b) To make digestion faster c) To prevent all diseases d) To improve breathing
Correct Answer: a
Why is the Moon called a natural satellite? a) It is smaller than the Earth b) It orbits the Earth naturally without human control c) It is made of rock d) It has no atmosphere
B
Label the forces acting on a parachute: Air resistance (up or down?) → ___ Weight (up or down?) → __
Up - Down
Complete the sentence: Salt dissolves in water to make a __________.
Solution
What does the word "pollution" mean? a) Making the environment cleaner b) The presence of harmful substances in nature c) The process of plants making oxygen d) A natural way to remove waste
B