One night, Lissy watched a constellation in the sky over a period of several hours. She found that the constellation seemed to move across the sky. Which of these can explain this?
A Some constellations are moving constellations.
B As the Earth rotates, constellations seem to move.
C The outer portions of the galaxy rotates very slowly around the Earth.
D All constellations move randomly through the sky.
What are the characteristics of metals?
A Good conductors of electricity and heat; solid at room temperature; transparent, shine brightly when polished.
B Good conductors of electricity and heat; solid at room temperature; opaque except in extremely thin films; do not shine at all when polished.
C Bad conductors of electricity and heat; solid at room temperature; opaque except in extremely thin films.
D Good conductors of electricity and heat; solid at room temperature; opaque except in extremely thin films; shine brightly when polished.
answer is a extremely simpleclearbahut Hassan saval
Refer to the given classification table and select the correct option.
AX could be hinge joint whereas Z could be pivot joint.
BY could be ball and socket joint whereas Z could be gliding joint.
CX could be gliding joint whereas Y could be pivot joint.
DY could be pivot joint whereas Z could be gliding joint.
Refer to the given flow chart and select the correct statement regarding P, Q, R and S.
AP could be silk and Q could be asbestos.
BQ could be cotton and R could be wool.
CR could be flax and S could be fleece.
DP could be asbestos and R could be silk.
Small pieces of rocks are carried away by rivers and streams and are deposited at newer places. Repeated deposition presses down the lower layers and hardens them into rocks. Examples of such kinds of rocks are____________ .
AGranite, pumice, obsidian
BSandstone, limestone, shale
CMarble, slate, quartzite
DSandstone, conglomerate, gneiss
In which of the following cases, a person is doing work in terms of science?
A Radhika is pushing against a stationary wall.
B Priya is sleeping.
C Meena is standing at bus stop waiting for her school bus.
D Gayatri is opening the main door of her house on hearing the door bell.