2nd Evaluation Repeated Exam Natural Science 2 ESO

UNIT 7. THE MATERIAL WORLD: ATOMS. 1) What is matter? a. A car is 3000 kg and occupies a volume of 6 m3. What is its density? b. You decide you want to carry a rock home from the beach. It is 20 centimeters on each side, and so has a volume of 80.000 cm 3. It is made of granite, which has a typical density of 2.8 g/cm3. How much will this rock weigh? c. A stone is 350 g/cm3 dense, if it has a volume of 30 dm3, what is its mass? Express the score in scientific notation and SI units. 2) Atoms a. Describe the structure of an atom. Make a picture to explain it. b. Fill the table: Net charge Mass H+ n +2

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UNIT 8. MATTER AND ENERGY. 1) 2) 3) 4) 5) 6)

Energy and work Define work and energy. Express work’s formula and unit. Make a scheme about forms of energy with short definitions. Define fossils fuels and name some examples of them. Define nuclear energy and explain the two types of nuclear energy existent. Define renewable sources of energy, explaining shortly how they work, and their disadvantages.

UNIT 9. MOTION. 1. An object travels with a constant speed. a) If it need three minutes to travel 360 m, what will be its speed? b) If the same object at the same speed is travelling for two hours, how far will it travel? 2. An object was moving with a constant speed of 3 m/s. Suddenly it started to accelerate with a constant acceleration. If 5 minutes later it had reached a speed of Antonio Jesús Moreno Quintero Colegio Guadalete - Attendis

2nd Evaluation Repeated Exam Natural Science 2 ESO 65 m/s. a) What was its acceleration? b) How far was the object ten minutes later? 3. A brick that is dropped from the top of a building takes 8 seconds to reach the ground. How tall is the building? 4. Draw a speed-time graph of a URM motion with a constant speed of 5 m/s. Draw its distance-time graph too. 5. Draw an acceleration-time, speed-time and distance-time graphs of a UARM motion with a constant acceleration of 2 m/s2.

Antonio Jesús Moreno Quintero Colegio Guadalete - Attendis

unit 7. the material world: atoms. unit 8. matter and ...

3) Make a scheme about forms of energy with short definitions. 4) Define fossils ... a) If it need three minutes to travel 360 m, what will be its speed? b) If the same ...

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