SSLC (English Medium) इयत्ता ७ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Classify the following as elements and compounds.

Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium

What are elements? What are they made of? 

Give an example for the elements derived from their Latin names.

Differentiate metals and non-metals.

Differentiate between elements and compounds.

Higher Order Thinking Skills.

List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.

Higher Order Thinking Skills.

In the diagram given below, the circle, square and triangle represent the atoms of different elements.

Identify all combinations that represent

1. molecule of a compound 
2. molecule of an element consisting of two atoms
3. molecule of an element consisting of three atoms

Assertion: Air is a mixture of elements only.

Reason: Only nitrogen, oxygen and neon gases exist in air.

Ravi has sound mind and physically fit body. It refers to ______.

-7°C temperature is ______ than 0°C temperature.

True or False – If false give the correct answer

Animal cells have a cell wall

True or False – If false give the correct answer

Only plant cells have chloroplasts.

Chloroplast : photosynthesis :: mitochondria : ______.

What are the functions of cell wall in plant cell?

Which organelle uses energy from sunlight to make starch?

Write about any three organelles in detail.

In a situation, how to explain, while your friend ask what is this, never seen before?

Compare the plant cell and the animal cell and complete the illustration given below.

Match the following

Heliocentric model is proposed by ______.