Exploring Substances: Acidic, Basic, and Neutral — Science STD 7 — Question

Draw a diagram to show the conduction.

Collect some flowers of different plants like papaya, rose, mustard, Petunia, cucumber, corn, etc. and group them under following heads.
(i) Which of these plants have unisexual flowers?
(ii) Which of these plants have bisexual flower?
(iii) What is the other name of unisexual and bisexual flower?

What will happen if there are no platelets in the blood?

Open drain is a big concern now-a-days. Justify.

How does digestion occur in ruminants grass-eating animals?

Explain with examples how animals have adapted themselves to overcome the competition for food and shelter in the rainforests.

Why do we feel warm in front of a bonfire?

How does the process of making curd from milk illustrate a chemical change?

Fill in the blanks in the given passage: The rainwater and ________________ from other sources such as rivers and ponds seeps through the ______________ and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called ______________.

Give reason:
Mercury is used in thermometers.