Quiz Name : Are you as smart as a grade 9 student?

Week : V9

MA 1. In a triangle, two angles measure 45° and 65°. What type of triangle is it based on its angles?

A - Right-angled triangle
B - Obtuse triangle
C - Acute triangle
D - ---

Korrekt svar : C - Acute triangle


BI 2. In a forest ecosystem, grass is eaten by rabbits, and rabbits are eaten by foxes. If the rabbit population suddenly decreases, what is likely to happen to the fox population?

A - It will increase
B - It will decrease
C - It will remain the same
D - ---

Korrekt svar : B - It will decrease


GEO 3. In a multicultural city, multiple languages are spoken, and festivals from different cultures are celebrated. This is an example of:

A - Cultural diffusion
B - Cultural isolation
C - Cultural extinction
D - ---

Korrekt svar : A - Cultural diffusion


CHEM 4. A student wants to separate a mixture of sand, salt, and iron filings. Which sequence of methods will successfully separate all three components?

A - Filtration → Magnetic separation â...read more A - Filtration → Magnetic separation → Evaporation
B - Magnetic separation → Filtration â...read more B - Magnetic separation → Filtration → Evaporation
C - Evaporation → Filtration → Magne...read more C - Evaporation → Filtration → Magnetic separation
D - ---

Korrekt svar : B - Magnetic separation → Filtration → Evaporation


PHY 5. A book rests on a table. Which of the following forces acts upward to balance the book’s weight?

A - Friction
B - Normal force
C - Tension
D - ---

Korrekt svar : B - Normal force


SS 6. Which of the following is a major cause of wars and conflicts?

A - Competition for resources
B - Celebrating cultural festivals
C - Building schools and hospitals
D - ---

Korrekt svar : A - Competition for resources


PE 7. Which of the following is a mental health benefit of regular physical activity?

A - Reduces stress and improves mood
B - Causes permanent fatigue and anxiety
C - Replaces the need for sleep
D - ---

Korrekt svar : A - Reduces stress and improves mood


MA 8. A rectangular garden has a length of 15 m and a width of 8 m. A circular fountain with a radius of 2 m is placed in the center. What is the area of the garden excluding the fountain? (Use π = 3.14)

A - 107.44 m²
B - 120 m²
C - 132.56 m²
D - ---

Korrekt svar : A - 107.44 m²


BI 9. A farmer uses chemical pesticides on his crops. Over time, he notices that some insects survive and reproduce. What ecological concept explains this phenomenon?

A - Competition
B - Natural selection
C - Succession
D - ---

Korrekt svar : B - Natural selection


GEO 10. A city is experiencing rapid urbanization, leading to overcrowding, traffic congestion, and pressure on water and electricity. Which of the following is the most likely cause of these problems?

A - Rural-to-urban migration and populat...read more A - Rural-to-urban migration and population growth
B - Decline in city population
C - Excess agricultural production in ru...read more C - Excess agricultural production in rural areas
D - ---

Korrekt svar : A - Rural-to-urban migration and population growth


CHEM 11. A solution contains salt dissolved in water. Which of the following methods would be the most suitable to separate the salt from the water?

A - Filtration
B - Evaporation
C - Magnetic separation
D - ---

Korrekt svar : B - Evaporation


PHY 12. A car moves in a circular track at a constant speed. Which of the following statements is true about its motion?

A - The car has no acceleration because ...read more A - The car has no acceleration because its speed is constant.
B - The car has acceleration because its...read more B - The car has acceleration because its direction is constantly changing.
C - The car is at rest at every point on...read more C - The car is at rest at every point on the track.
D - ---

Korrekt svar : B - The car has acceleration because its direction is constantly changing.


SS 13. Which of the following treaties helped to end World War I?

A - Treaty of Versailles
B - Treaty of Paris (1783)
C - Treaty of Tordesillas
D - ---

Korrekt svar : A - Treaty of Versailles


PE 14. Which of the following activities is best for both relaxation and reducing stress?

A - Sitting quietly and scrolling on a p...read more A - Sitting quietly and scrolling on a phone for hours
B - Practicing yoga or light stretching
C - Overworking on homework without brea...read more C - Overworking on homework without breaks
D - ---

Korrekt svar : B - Practicing yoga or light stretching


MA 15. In parallelogram ABCD, angle A measures 110°. What is the measure of angle C?

A - 70°
B - 110°
C - 90°
D - ---

Korrekt svar : B - 110°