اختبار ساينس science - ثانية اعدادي - مقرر اكتوبر

هذه معاينة نصية للأسئلة للاطّلاع والمراجعة فقط. لخوض الاختبار تفاعليًّا مع تصحيح آلي ونتيجة فورية، اضغط زر «ابدأ الاختبار» أدناه.

1. What is the definition of matter?
   • أ. Anything that has mass and occupies space
   • ب. Anything that can be seen
   • ج. Anything that has volume
   • د. Anything that has weight
2. Which of the following is NOT a common state of matter?
   • أ. Wood
   • ب. Liquid
   • ج. Gas
   • د. Solid
3. What property do solids and liquids share?
   • أ. Definite volume
   • ب. Ability to flow
   • ج. Compressibility
   • د. Definite shape
4. Why are liquids and gases classified as fluids?
   • أ. Because they can flow
   • ب. Because they have mass
   • ج. Because they are compressible
   • د. Because they have definite volume
5. What happens to the volume of a gas when it is compressed?
   • أ. Decreases
   • ب. Becomes zero
   • ج. Increases
   • د. Remains constant
6. What is diffusion?
   • أ. Movement of particles from high to low concentration
   • ب. Mixing of two solids
   • ج. Compression of gases
   • د. Movement of particles from low to high concentration
7. In which state does diffusion occur fastest?
   • أ. Gases
   • ب. Plasma
   • ج. Liquids
   • د. Solids
8. What is Brownian motion?
   • أ. Random movement of large suspended particles
   • ب. Flow of liquids
   • ج. Compression of gases
   • د. Regular movement of particles
9. What is the fourth state of matter?
   • أ. Plasma
   • ب. Liquid
   • ج. Solid
   • د. Gas
10. Which of these is a physical change?
    • أ. Melting ice
    • ب. Rusting iron
    • ج. Cooking food
    • د. Burning wood
11. Which of these is a chemical change?
    • أ. Burning paper
    • ب. Dissolving sugar
    • ج. Cutting paper
    • د. Breaking glass
12. What indicates a chemical reaction has occurred?
    • أ. Formation of new substances
    • ب. Change in temperature only
    • ج. Change in size
    • د. Change in shape
13. Which is NOT an indicator of chemical reaction?
    • أ. Change in mass
    • ب. Precipitate formation
    • ج. Gas formation
    • د. Color change
14. What happens when baking soda reacts with vinegar?
    • أ. Gas evolution
    • ب. Temperature decrease
    • ج. Color change
    • د. Formation of precipitate
15. Why do solids have definite shape?
    • أ. Strong attractive forces between particles
    • ب. High compressibility
    • ج. Large distances between particles
    • د. Weak attractive forces
16. What is compressibility?
    • أ. Ability to reduce volume under pressure
    • ب. Ability to diffuse
    • ج. Ability to change shape
    • د. Ability to flow
17. Which has the strongest attractive forces between particles?
    • أ. Solids
    • ب. Plasma
    • ج. Liquids
    • د. Gases
18. What is the main difference between boiling and evaporation?
    • أ. Boiling occurs throughout liquid at specific temperature
    • ب. Evaporation produces bubbles
    • ج. Evaporation occurs at boiling point only
    • د. Boiling occurs at surface only
19. Which factor does NOT affect evaporation rate?
    • أ. Color of liquid
    • ب. Surface area
    • ج. Air currents
    • د. Temperature
20. What is the boiling point of water at normal atmospheric pressure?
    • أ. 100°C
    • ب. 150°C
    • ج. 50°C
    • د. 0°C