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Physics, Biology, Chemistry
8th
grade
Science Quiz Bee - Grade 8 Round 2
8 questions
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- 1. Multiple Choice
Which of the following is not a characteristic of viruses?
Viruses have DNA and RNA as their genetic material.
Viruses have cell walls which protect them from immune system/antibodies.
Viruses have nucleic acid which is protected by a protein coat.
Viruses are able to make copies of themselves
inside living organisms.
- 2. Multiple Choice
Which of the following is the correct name for the chemical formula of CuO?
Copper oxide
Copper(I) oxide
Copper(II) oxide
Copper monoxide
- 3. Multiple Choice
“In severe cases, a ventilator may be needed”. Which of the following is not true about ventilator?
Ventilators monitor a patients’ inhalation and exhalation process.
Repeated ventilation can cause a long-term lung damage
Ventilators bypass constricted airways and deliver highly oxygenated air.
Ventilators filters the air from virus and pathogen to help damaged lungs to diffuse oxygen.
- 4. Multiple Choice
A workman rolls a barrel of weight 2000 N up a plank of length 2.0 m and onto a lorry. The back of the lorry is 0.80 m above the horizontal surface of the road. What is the work done on the barrel against gravity?
1000 J
1600 J
2500 J
4000 J
- 5. Multiple Choice
Use of periodic table is needed.
What is the electronic configuration of magnesium ion, ?2, 8
2, 8, 2
2, 8, 4
2, 8, 8
- 6. Multiple Choice
How can SARS CoV2 lead to severe pneumonia?
Inflammation caused by SARS CoV2 fill alveoli with liquid.
Inflammation caused by SARS CoV2 fill the trachea with liquid.
Inflammation caused by SARS CoV2 fill the larynx with liquid.
Inflammation caused by SARS CoV2 fill the epiglottis with liquid.
- 7. Multiple Choice
In a weightlifting contest, an athlete lifts a metal bar of mass 20kg fitted with a mass of 80 kg on each end. The lift from ground to a height of 2.5m takes 0.50 s. The gravitational field strength g is 10 N/ kg. What average power does the weightlifter exert in providing the gravitational potential energy during this lift?
0.90 kW
5.0 kW
8.0 kW
9.0 kW
- 8. Multiple Choice
Which one of the following dot-and-cross diagrams represents the bonding in a molecule of ammonia?
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