Physical and Chemical Changes — Science STD 7 — Question

Which of the following sets of substances contains acids only?

In which of the following processes new offspring with special characters is produced by selecting parents?

Food from the leaves is conducted ______ through the phloem in the stem.

Which of the following liquid is bad conductor of electricity:

The purpose of armature in an electric bell is:

A person placed his fingers of the right hand on the inner side of his left wrist. He felt some throbbing movements. This throbbing movement is known as _________________ and it occurs _________________

A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in:

During hot summer days the air above the soil:

The time taken by a vibrating body to complete one vibration is:

During heavy exercise, we get cramps in the legs due to the accumulation of