Nutrition in Plants — Science STD 7 — Question

Name two alternative arrangements for sewage disposal where there is no sewerage system.

Instead of water explain the reason, why is the mercury used in the thermometer?

What is respiration in plants? How is it different from photosynthesis? Explain the importance of both processes.

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 ______________.

Create a 3D model of stomata using clay and label its parts.

What facilitates opening and closing of stomatal pores?

Why is it important to destarch a plant before an experiment?

Why even after a heavy rainfall, the ground in the forest remains dry?

Why does only a small area experience a total solar eclipse while lunar eclipses are visible over a larger area?

Define average speed.