Evaluation

Evaluation. SCORM Quiz

Question

1. Identify the types of energy that appear in the following process: 

1. H atoms from the sun fuse to produce helium, generating a lot of ___________ energy.

2. This energy is transmitted through space to the earth through waves, in the form of ____________ energy.

3. This energy is absorbed in the leaves of plants and converted into _______________ energy.

4. The cows eat the grass and use the energy they acquire for walking through the field, converting it into __________________ energy.

Answers

a) chemical - light - atomic - mechanical 

b) potential - thermal - chemical - driving 

c) nuclear - electromagnetic - chemical - kinetic 

Question

2. How much heat is needed to heat a 200 g steel ball from 10 to 40 ºC ? Specific heat of steel = 0.46 J/gºC

Answers

a) 5.24 J

b) 10,5 J

d) 7,13 J

e) 2,76 J

Question

3. The type of heat transmission that occurs along with a current of a fluid mass between two points at different temperatures is called: 

Answers

a) Radiation
 

b) Conduction

c) Convection

d) Thermal expansion

Question

4. The phenomenon by which matter increases its volume as its temperature rises is called:

Answers

a) convection

b) thermal expansion

c) boiling

d) conduction

Question

5. This physical phenomenon explains the formation of clouds, ocean currents and the spread of heat from the interior of the earth to its surface: 

Answers

a) radiation 

b) boiling 

c) convection 

d) thermal expansion

Question

6. If two bodies at different temperatures come into contact, after a while these objects reach the same temperature. What is the name of this phenomenon?

Answers

a) heat

b) radiation 

c) thermal imbalance 

d) thermal equilibrium 

Question

7. An electric oven with a power of 2000 W is used for 10  hours. Calculate the energy it consumes in kW·h.

Answers

a) 200 kW·h

b) 20 kW·h

c) 0,055 kW·h

d) 0,005 kW·h

Question

8. Calculate the current intensity that passes through a 7 W LED lamp, if the voltage is 220 V.

Answers

a) 0,032 A

b) 31,43 A

c) 1540 A

d) 255 A

Question

9. Calculate the energy (in kJ) consumed by a light bulb with a resistance of 30 Ω when a current of 2 A passes through it for three hours. 

Answers

a) 270 kJ 

b) 19440 kJ

c) 1296 kJ

d) 7621 kJ

Question

10. Calculate the efficiency of a 1500 W hairdryer if, when connected to the mains (230 V), the current that passes through it is 4.5 A.

Answers

a) 29 %

b) 145 %

c) 69 %

d) 90 %

Question

11. How much money does it cost per day to have a 300 W refrigerator plugged in, if the price of the kW·h is 20 cents/kW·h?

Answers

a) 0,23 €

b) 0,5 €

c) 1,17 €

d) 1,44 €

Question

12. In which of the following power stations is energy obtained from the chemical energy stored in the bonds of combustible substances?

Answers

a) thermal 

b) geothermal 

c) nuclear 

d) solar 

Question

13. The upper limit of total allowed carbon dioxide (CO2) emissions to remain below a specific global average temperature is called:

Answers

a) carbon footprint 

b) limit concentration 

c) global carbon budget 

d) sustainable development goal 

Question

14. Which of the following elements is not part of a hydropower plant?

Answers

a) boiler

b) turbines

c) generator

d) condenser 

e) (a) and (d) are correct 

Question

15. The greenhouse effect has the following consequences:

Answers

a) a hole is created in the ozone layer 

b) causes acid rain that damages crops and buildings 

c) the average temperature of the planet is increasing 

d) all are correct 

Question

16. Which of the following is not a consequence of climate change?

Answers

a) Increase in carcinogenic radiation passing through the atmosphere and reaching the Earth 

b) Melting of the poles and rising sea levels 

c) Increased desertification and loss of biodiversity

d) Changes in atmospheric air currents, causing a greater number of extreme weather events 

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