Motion and Time — Science STD 7 — Question

Name the phenomenon that is involved in the formation of image of an object by a concave mirror.

Which type of spherical mirror is used as reflectors at sharp turns or blind corners in big shopping malls or as rear-view mirrors in cars?

What changes did you observe in the appearance of the liquid after aeration?

Is lime water an acidic or basic solution?

Fill in the blanks:
Our body is a _____ of electricity.

Except plants, why cannot other living organisms prepare their food using CO₂, water and minerals?

State the principle behind the working of a pinhole camera.

Ram hast to grow wheat crop in his field, what kind of soil he will prefer?

Is there any role of liver in digestion of fats? Explain.

State whether the following statements are true or false. If false, give the correct statement. Forests influence climate, water cycle and air quality.