Question

BALALOK MATRICULATION HR. SEC. SCHOOL, CHENN.
Std -VII
1st Term summative assessment examination-2020
Date:
SCIENCE
1. Answer the following.
1. Density of Mercury is
2. Analogy:
Mercury: Liquid at room temperature
Oxygen:
3. is positively charged particle
a) Proton
b) Electron c) Neutron
4. The basic unit of matter is
a) atom
b) molecule e) neutron
5. The first letter of an element always written in letter
6. Asexual reproduction in yeast is
a) budding b) spore formation c) Fragmentation
7. Analogy
Typhoid : Bacteria :: Hepatitis:
8. is a non-communicable disease.
(heart attack / rabies)
9. disease is caused, due to the lack of Vitamin A.
10. True or false. If false give the correct statement.
a) First-degree burns damage the whole skin.
10
II. Answer in one or two sentences.
1. What is centre of gravity?
2. Name some of the derived quantities
3. Give the value of one light year.
4. What is atomicity of elements?.
5. Name the sub-atomic particles.
6. What is cross pollination?
7. Write notes on phyllode.
8. What is hygiene?
9. Name the mode of transmission of communicable disease.
10. Why the first aid is essential?​

Answer 1

Answer:

1) 13.6 g.cm–³ at 20⁰c

4)an element