The Machine Age - 2 Class 5 Worksheet SST

Q1: Fill in the Blanks.

(i) A machine is a device that ____________ human or animal efforts to accomplish physical tasks.

(ii) Simple machines include the lever, wedge, wheel, pulley, and ____________.

(iii) James Watt used ____________ power to run water pumps in the year 1769.

(iv) Petroleum is formed from the remains of ____________ that lived and died millions of years ago.

(v) Wind-energy is harnessed using a device called a ____________.

(vi) The major energies used include steam, gas, petrol, ____________, and electricity.

(vii) Wind-energy and solar-energy are currently not very ____________.

(viii) Hydro-energy is generated using the power of ____________.

(ix) The shift from animal power to coal energy to petroleum energy is a shift in ____________ approach to energy.

(x) ____________ is an exhaustible source of energy that generates greenhouse gases.

Q2: True and False.

(i) Simple machines include the lever, wedge, and steam engine.

(ii) Wind-energy is a cost-effective source of energy.

(iii) Petroleum is formed from recent plant and animal remains.

(iv) Hydro-energy is available everywhere.

(v) The major energies used in the past were wind, solar, and animal energy.

Q3: Match the Following.

Q4: Short Answer Questions.

(i) Describe what a machine is and how it simplifies tasks.

(ii) Name three simple machines and give an example of each.

(iii) How did James Watt contribute to the use of steam power?

(iv) Explain the process of how petroleum is formed.

(v) What are the advantages and disadvantages of wind-energy as a source of power?

You can access the solutions to this worksheet here.