Olympiad Test: High Order Thinking Skills -1

# Olympiad Test: High Order Thinking Skills -1

Test Description

## 20 Questions MCQ Test Science Olympiad Class 7 | Olympiad Test: High Order Thinking Skills -1

Olympiad Test: High Order Thinking Skills -1 for Class 7 2023 is part of Science Olympiad Class 7 preparation. The Olympiad Test: High Order Thinking Skills -1 questions and answers have been prepared according to the Class 7 exam syllabus.The Olympiad Test: High Order Thinking Skills -1 MCQs are made for Class 7 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: High Order Thinking Skills -1 below.
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Olympiad Test: High Order Thinking Skills -1 - Question 1

### Which of the following graphs does not represent uniform speed?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 1

In a uniform speed, the change in position of the body remains the same for a particular interval of time. The distance travelled in option (a), (c) and (d) is the same, in (c) it is zero. But the distance changes in option (b). Hence, the answer is (b).

Olympiad Test: High Order Thinking Skills -1 - Question 2

### With what speed should a car travel so that it can cover a distance of 8 km. in 15 minutes?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 2

Time  = 15 minutes
distance = 8 km

= 8 × 4 km/hour
= 32 km/h

Olympiad Test: High Order Thinking Skills -1 - Question 3

### An odometer is used to measure

Olympiad Test: High Order Thinking Skills -1 - Question 4

In the Celsius scale, the upper fixed point is

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 4

The upper fixed point in the Celsius scale is 100°C, which is the boiling point of water.

Olympiad Test: High Order Thinking Skills -1 - Question 5

When same amount of heat is supplied to hydrogen peroxide, iron, and carbon dioxide, which substance expands the most?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 5

Gases  expand the most upon heating because of the large intermolecular distances and less intermolecular force. Carbon dioxide being a gas will expand the most.

Olympiad Test: High Order Thinking Skills -1 - Question 6

Conduction cannot take place in

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 6

A medium (solid) is required for conduction to take place.

Olympiad Test: High Order Thinking Skills -1 - Question 7

The speed of light is

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 7

The speed of light decreases with an increase in the density of the medium.

Olympiad Test: High Order Thinking Skills -1 - Question 8

At a particular time, the constant of ratio of length of a light pole and the length of its shadow is found to be 2.5 m. Now, the length of the shadow of a flag pole is 25 m, calculate the length of the pole.

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 8

Let the height of the flag pole be ‘h’ The length of the light pole = 25 m The constant ratio of length of object to its shadow = 2.5 (given)

Olympiad Test: High Order Thinking Skills -1 - Question 9

We can create enlarged, virtual images with

Olympiad Test: High Order Thinking Skills -1 - Question 10

In which circuit will the bulb (s) glow the brightest?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 10

The chemical energy stored in two cells is more than in one cell. The electrical energy used by one bulb is less than the energy used by two bulbs. So, the bulb in the circuit that has one bulb and two cells will glow the brightest.

Olympiad Test: High Order Thinking Skills -1 - Question 11

An electric heater is used in kitchens to cook food, it converts electrical energy to

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 11

A heater is used to obtain heat energy. For light energy, a bulb or other sources are used.

Olympiad Test: High Order Thinking Skills -1 - Question 12

Which of the following is not a chemical change?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 12

Here, only a change of state from liquid and solid to gas is seen, and no new substances are formed

Olympiad Test: High Order Thinking Skills -1 - Question 13

When you put a candle in a vessel and heat the vessel, you will observe that the candle does not burn, it changes its shape and state. What kind of change is this?

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 13

The candle started melting, but since no new substance was formed, it is a physical change.

Olympiad Test: High Order Thinking Skills -1 - Question 14

The metal which can displace hydrogen from acid is

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 14

Calcium is more reactive than hydrogen.

Olympiad Test: High Order Thinking Skills -1 - Question 15

Na2 CO3+ 2HC1 ?

Olympiad Test: High Order Thinking Skills -1 - Question 16

The metal which can displace zinc from its solution is

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 16

Magnesium is more reactive than zinc.

Olympiad Test: High Order Thinking Skills -1 - Question 17

When a vehicle moves very fast, _________ is created temporarily behind it.

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 17

When a wind flows very fast, a low pressure is produced temporarily which is filled by the rushing wind nearby.

Olympiad Test: High Order Thinking Skills -1 - Question 18

Sea and land breezes are caused due to

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 18

Sea and land breezes are caused because of an uneven heating of the earth and through convection currents.

Olympiad Test: High Order Thinking Skills -1 - Question 19

When water is cooled, it contracts until it reaches ______ and then it starts expanding.

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 19

Though substances contract on cooling. water expand when cooled beyond 4°C. This is known as anomalous behaviour of water.

Olympiad Test: High Order Thinking Skills -1 - Question 20

Our body temperature is maintained at

Detailed Solution for Olympiad Test: High Order Thinking Skills -1 - Question 20

Human beings are warm blooded, which means that their body temperature has to be maintained around a particular temperature which is 37°C or 98° F. Water plays an important role in this.