10th Science  Refresher Course Answer key

Topic 1 - MEASUREMENT

• Class: 10
• Subject: Science - EM
• Topic: 1. MEASUREMENT

10th Science MEASUREMENT Answer

EVALUATION

I. Fill in the Blanks

1. The degree of hotness or coldness of a substance is __________________

2. The SI unit of mass is _____________________

3. One mole of a substance contains ___________________ atoms or molecules.

4. _______________ clock uses the periodic vibrations accruing within the atom.

5. Luminous intensity is measured by ____________________

6. Heat energy given to a substance will __________________________ its temperature.

7. Metre is the unit of ________

II. Choose the correct answer

1. The amount of electric charges flowing through a conductor in one second is _______

(a) Electric Current (b) Resistance (c) Electric potential

2. The SI unit of temperature is ______________

(a) Celsius (b) Fahrenheit (c) Kelvin

3. The SI unit of luminous intensity is________________

(a) mole (b) Candela (c) Ampere

III. Make True / False

1. The SI unit of electric current is kilogram. (True/false)

2. A physical balance is more sensitive than a beam balance. (True/false)

3. Electric current is measured by an instrument called ammeter. Is it true or false?

4. Atomic clocks are used in GPS devices. Is it true or false?

IV. Match the following

Physical quantities         SI units

1. a) Length  -  kelvin

b) Mass   - metre

c) Time  - kilogram

d) Temperature    - second

Instrument                            Measuring things

2. a) Screw gauge     - Vegetables

b) Vernier caliper      - Coins

c) Beam balance       - Gold ornaments

d) Digital balance     - Cricket ball

V. Answer the following questions

1. How will you calculate Indian standard time (IST)?

2. What are the scales of temperature?

3. Name the three hands used to show time in an analog clock.

4. How many times will the minute hand rotate in one hour?

5. Can you find the diameter of a paper using the ruler from your instrument box?