Test Series

Solar eclipse occurs when Moon blocks sunlight.
Moon comes between Sun and Earth.
This happens during new moon phase.
Shadow falls on Earth.

Vitamin A supports reproductive health.
Important for body growth.
Deficiency affects fertility.
Also important for vision.

Evaporation removes heat.
Surface water cools down.
Cooling continues in summer.
Hence pond stays cool.

Car body acts like Faraday cage.
Electric charge flows outside.
Passengers remain safe inside.
Avoid standing outside.

Smoke contains harmful particles.
Produced from burning fuel.
Major cause of pollution.
Affects air quality.

People consume oxygen.
Respiration releases carbon dioxide.
Closed rooms reduce oxygen level.
CO₂ concentration increases.

At night photosynthesis stops.
Plants respire like animals.
They release carbon dioxide.
Hence not advisable.

Plants absorb nitrogen compounds.
Mainly nitrates and ammonium ions.
Used to form proteins.
Essential for growth.

Photosynthesis releases oxygen.
Dissolves in water.
Fish use this oxygen.
Supports aquatic life.

Vitamin A helps reproductive health.
Also important for vision.
Deficiency causes night blindness.
Found in carrots and milk.

Pulse indicates heart beats.
Felt at wrist arteries.
Shows heart rate per minute.
Important health indicator.

Stripes act as camouflage.
Helps animals blend with surroundings.
Protects from predators.
Example: tiger, zebra.

Smoke contains harmful particles.
Produced from burning fuel.
Major air pollutant.
Affects air quality.

People consume oxygen.
Respiration releases CO₂.
Closed room reduces oxygen.
CO₂ concentration rises.

Photosynthesis stops at night.
Plants respire like animals.
They release carbon dioxide.
Hence not safe.

Plants absorb nitrates.
Also ammonium ions.
Used to make proteins.
Essential nutrient.

Photosynthesis releases oxygen.
Dissolves in water.
Fish use dissolved oxygen.
Supports aquatic life.

Evaporation removes heat.
Surface water cools.
Cooling continues in summer.
Hence pond remains cool.

Compost contains many nutrients.
Improves soil fertility.
Organic matter present.
Acts as balanced fertiliser.

Triple antigen = DPT vaccine.
Protects from diphtheria.
Pertussis and tetanus.
Typhoid not included.

Milk fever occurs after calving.
Blood calcium decreases.
Muscles become weak.
Hence calcium deficiency.

Hen eggs hatch in about 21 days.
This equals three weeks.
Embryo grows inside egg.
Then chick emerges.

Eucalyptus grows very fast.
Used for paper pulp.
Common plantation tree.
Commercially cultivated.

WBC produce antibodies.
Antibodies fight infection.
Low WBC weakens immunity.
Hence antibodies decrease.

Iron forms haemoglobin.
Carries oxygen in blood.
Deficiency causes anaemia.
Common nutritional disease.

Reserpine extracted from Rauwolfia.
Used in hypertension treatment.
Acts on nervous system.
Lowers blood pressure.

DDT used for mosquito control.
Mosquitoes developed resistance.
Control became difficult.
Malaria cases increased.

Clouds trap heat.
Surface cools slowly.
Less condensation occurs.
Hence less dew.

Cotton seed rich in oil.
Provides extra energy.
Milk fat increases.
Temporary effect.

Highly contagious livestock disease.
Caused by virus.
Blisters appear in mouth and feet.
Affects cattle productivity.

Archimedes’ principle applies.
Buoyant force equals body weight.
Then body floats partially.
Stable floating occurs.

Permanent hardness due to sulphates/chlorides.
Boiling removes only temporary hardness.
Hence boiling ineffective.
Chemical treatment needed.

Sweat removes salts.
Electrolyte imbalance occurs.
Body feels weak.
Salt intake restores balance.

Two plants joined artificially.
Stem tissues fuse together.
Both plants grow on same base.
Called grafting.

Deep water more compressed.
Salinity also higher.
Both increase density.
Hence option (a).

Liver stores glucose.
Converted to glycogen.
Maintains blood sugar.
Important metabolic organ.

Pasteurisation kills pathogens.
Not all bacteria destroyed.
Milk becomes safer.
Shelf life increases.

Pests grow in warm moist conditions.
Moisture helps reproduction.
Temperature speeds growth.
Both important factors.

Tree forms yearly rings.
Each ring one year growth.
Count rings to estimate age.
Common scientific method.

Organisms compete for survival.
Best adapted survive.
Called natural selection.
Darwin proposed theory.

Atmospheric pressure decreases.
Internal blood pressure higher.
Capillaries rupture.
Causes nose bleeding.

Cold air molecules closer.
Density increases.
More mass per volume.
Hence heavier.

IVF technique used.
Egg fertilised in lab.
Embryo transferred to uterus.
Pregnancy develops normally.

Bacteria break organic matter.
Recycle nutrients.
Essential for soil fertility.
Important decomposers.

Cereals provide carbohydrates.
Milk gives proteins.
Vegetables rich in vitamins.
Balanced diet combination.

Light travels in straight line.
Small hole forms pinhole camera.
Image becomes inverted.
Principle of rectilinear propagation.

Root hairs absorb water.
Transplanting damages them.
Water absorption decreases.
Plant growth affected.

BCG protects against tuberculosis.
Given at birth.
Part of national immunisation.
Boosts early immunity.

Heat expands pendulum rod.
Length increases.
Time period increases.
Clock runs slower.

Air density lower.
Less air resistance.
Ball loses less energy.
Hence bounces higher.