SSLC (English Medium) Class 7 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Rewrite the given sentence in correct form.

Elements contain two or more kind of atoms and compounds contain only one kind of atom.

Higher Order Thinking Skills.

What changes take place in the movement and arrangement of particles during heating process?

Assertion: Hydrogen is an element.

Reason: Hydrogen cannot be broken down into anything simpler.

The basic unit of matter is ______.

The smaller particles found in the atom is called ______.

State true or false. If false, correct the statement.

The basic unit of an element is molecule.

State true or false. If false, correct the statement.

An atom is electrically neutral.

K: Potassium:: C: ______.

Assertion: An atom is electrically neutral.

Reason: Atoms have equal number of protons and electrons.

Define – Atom.

Name the sub-atomic particles.

Draw the structure of an atom and explain the position of the sub-atomic particles.

An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.

Project.

To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.

Define the following term with an example.

Compound

Define the following term with an example.

Metal

Define the following term with an example.

Non-metal

Define the following term with an example.

Metalloid

State true or false. If false, correct the statement.

All food should be covered.

International unit of measuring temperature is ______.