Quiz Name : Are you as smart as a grade 9 student?
Vecka : v22
MA 1. A teacher recorded the number of books read by 5 students in a month:
2, 4, 4, 6, 8
What is the mode of this data set?
A - 2 B - 4 C - 6 D - ---
Korrekt svar : B - 4
BI 2. A student set up an experiment using a potted plant. One leaf was covered with petroleum jelly on both surfaces, while another leaf was left uncovered. After a few hours in sunlight, the uncovered leaf showed a drop in mass, but the covered leaf did not.
What is the most likely explanation for this observation?
Korrekt svar : B - The uncovered leaf lost water mainly through transpiration
GEO 3. A country is facing severe water shortages due to overuse of groundwater and irregular rainfall. The government plans to reduce the problem by adopting different strategies.
Which of the following actions would be the most effective combination of conservation measures?
Korrekt svar : B - Rainwater harvesting, afforestation, and reducing water wastage
CHEM 4. A student adds blue litmus paper to a solution and it turns red. The student then adds a small amount of sodium hydroxide to the same solution, and the red color disappears and turns purple/neutral.
What is the correct explanation for this observation?
Korrekt svar : B - The astronaut’s mass stays the same, but weight decreases due to weaker gravity
SS 6. In a market, the price of mangoes increases significantly during summer because many people want to buy them, but the supply remains limited.
Which economic concept best explains this situation?
A - Inflation B - Supply and demand C - Barter system D - ---
Korrekt svar : B - Supply and demand
PE 7. In a 4 × 100 meter relay race, which of the following is most important for a team’s success?
Korrekt svar : B - Smooth and well-timed baton exchanges between runners
MA 8. A student rolls a fair six-sided die once. What is the probability of getting an even number?
A - 1/6 B - 1/2 C - 1/3 D - ---
Korrekt svar : B - 1/2
BI 9. A student compared three plants:
Plant A: tall stem, many branches, thick woody stem
Plant B: small soft stem, no branches, short height
Plant C: medium height, woody stem, few branches
Which classification is most accurate?
Korrekt svar : B - Plant A = tree, Plant B = herb, Plant C = shrub
GEO 10. A student studies a region where mountains block moist winds, causing one side to receive heavy rainfall while the other side remains dry.
What is this geographical phenomenon called?
A - Monsoon effect B - Rain shadow effect C - Ocean current effect D - ---
Korrekt svar : B - Rain shadow effect
CHEM 11. A student is given three substances:
Substance A turns red litmus paper blue
Substance B turns blue litmus paper red
Substance C does not change either litmus paper
Which of the following is correct?
Korrekt svar : B - A is a base, B is an acid, C is neutral
PHY 12. A student drops two objects from the same height in a vacuum chamber: a feather and a stone. Both reach the ground at the same time.
What is the correct explanation for this result?