STD 7 SCIENCE UNIT TEST
STD 7 SCIENCE UNIT TEST
plants, photosynthesis process, other modes of nutrition in plants, how
nutrients are replenished in the soil.
the process of obtaining wool and silk. It
describes the animals that yield wool and the process through which fibres are
converted into wool. Then the topic of silk begins. It describes the life
history of the silk moth and the process of obtaining silk from cocoons.
how we find out whether an
object is hot or cold, how to measure temperature. Then this chapter explains
about the laboratory thermometer and transfer of heat. At the end it talks
about the kind of clothes we wear in summer and winters.
the basic
definition of acids and bases, types of natural indicators around us, the
process of neutralisation and examples of neutralisation in daily life.
the Physical and
Chemical changes through various activities. After this the chapter throws
light on the topic, rusting of iron and crystallisation.
STD 7 ALL SUBJECT UNIT TEST
STD 7 SCIENCE UNIT TEST
the description of weather and climate.
Then, it explains the effect of climate on living organisms and how they get
adapted to the climate. The polar regions, the tropical rainforests are also
explained at the end of this chapter.
the natural calamities that destroy
human life and causes loss to the property. This chapter starts with the
properties of air i.e
various situations in which wind
current is generated due to uneven heating on the earth. After that, the
chapter explains about thunderstorms, cyclones, the destruction caused by
cyclones, effective safety measures and how technology helps in protecting us
from these disasters.
Soil is important for life on earth. The chapter starts with the
topic soil profile, which describes the different layers of soil. Then the
topics like soil types, properties of soil, moisture in the soil, absorption of
water by soil, soil and crops are elaborated.
an explanation of the respiration
process. Then it talks about the breathing process, how we breathe, what we
breathe out, how breathing happens in other animals. It also explains how fish
breathe underwater and the process of respiration in plants.
the transport of
substances in animals and plants. The chapter explains the circulatory system,
excretion in animals and transportation of underwater plants in detail.
STD 7 SCIENCE UNIT TEST
the various modes of
reproduction. The Asexual reproduction takes place through budding,
fragmentation and spore formation. Whereas sexual reproduction takes place
through pollination and fertilization. At the end the chapter explains the
fruits and seed formation and seed dispersal process.
the concept of
speed, measurement of time, how to measure speed. At the end of the chapter,
the distance-time graph is described to represent the motion of object in
pictorial form.
symbols of electric
components. Then it describes the heating effect of electric current, magnetic
effect of electric current, electromagnet and electric bell in detail.
light travels
along straight lines. The concept of reflection of light, plane mirrors,
spherical mirrors, images formed by lenses are also described in detail.
Water is essential for all living organisms. This chapter has
been added to make students aware of water conservation. The chapter starts
with how much water is available on earth. Then it talks about the water cycle
and forms of water. Then it explains that groundwater is an important source of
water so we must use it wisely. Further, the concept of depletion of water,
water management has been described. The chapter also throws light on roles
that humans can play to save water and the effect of water scarcity on plants.
The chapter explains that forest is a system comprising various
plants, animals and microorganisms. The various components of forest are
interdependent on one another. The interaction between soil, water, air and
living organisms take place in the forest. We should maintain our forest and
plant new trees to maintain perfect balance in nature. Otherwise, it will
affect our environment badly.
Water is the lifeline for humans and animals on earth.
Emphasizing this, the chapter explains what is sewage, treatment of pollutant
water, wastewater treatment plant, better housekeeping practices, sanitation
and disease, an alternative arrangement for sewage disposal and sanitation at
public places.
The vial contains more than one element in a certain amount. Each element loses its basic properties and the compound crosses a new property, for example, * Hydrogen (H) is a generous gas. Oxygen is a beneficial gas. Two atoms of the hydrogen element combine with one atom of the oxygen element to form one molecule of poly (HqO). • Water is a combination of pavami form. ! Why