Asset Practice Paper 1- Grade 7

How are warm-blooded animals different from cold-blooded ones?

Three large, identical ice cubes were wrapped in different materials. One was wrapped in an aluminium foil, the second in a woolen sweater and the third in a cotton shirt. All of them were kept on a wooden table in a room. Which one of them will melt first?

Mercury and Alcohol are two common liquids used in thermometers. The boiling point of MERCURY is 357 degree celsius, while its freezing point is -39 degree celsius For ALCOHOL, the boiling point is 78 degree celsius and the freezing point is -80 degree celsius It is required in a laboratory to make measurements which are in the region of -60 degree celsius. The thermometer most suitable for taking this measurement is [blank_start]laboratory[blank_end] thermometer

We know that the leaves make food for a plant. When a seed is planted, before its leaves grow, the young plant get its food from [blank_start]cotyledons[blank_end].

Plants take in oxygen during the [blank_start]day[blank_end]

Sublimation of an element or compound is the change from a solid directly to a gas with no intermediate liquid stage. Sharada was told that if pepper seeds are placed along with camphor, the sublimation of camphor would reduce. Of these boxes, (some are open and some are closed). Which TWO should she use to check whether this is true?

Sujai suspended a bar magnet and tried to check if thin iron clips would hang from it. He kept hanging them one after another, till no more pins would hang. He tried it at 5 places as shown in the figure. Sujai made the following conclusions from the experiment. 1. The magnetic attraction is powerful at the poles and weaker as we go towards the centre. 2. A bar magnet when freely suspended, always points towards the NS direction. 3. Between P and Q and between S and T, the magnet will not attract any iron clips. 4. All the pins shown in the figure behave like magnets. Which of these are VALID conclusions?

An earthen pot is made up of mud and has numerous pores in it. If water is filled in the pot, tiny amounts of water comes out from these pores, keeping the outer surface slightly moist. After a few hours, the water in the pot becomes refreshingly cool. This happens due to [blank_start]evaporation[blank_end].

Galileo, in order to measure the speed of light, performed this simple experiment: He and his assistant each took a lantern that had a shutter in front of it, and stood on hilltops one mile apart in the night. Galileo was to flash his lantern, and the assistant was to open the shutter of his own lantern as soon as he saw the light from Galileo's lantern. Galileo had planned to measure the time taken for light to travel from one hill to the other and back, and calculate the speed of light using the formula, Speed = distance travelled / time taken. But he could not measure the speed of light using this method. The time taken for the light to travel would have been [blank_start]too little[blank_end] to have been measured by them.

White rice is produced by removing the husk (the outer cover) and then polishing it to remove the bran (brown layer). Parboiled rice is produced by soaking, steaming and draining the complete grain of rice and only then removing the husk. Parboiled rice helps the body to get rid of undigested food better than white rice. Based on the above information, parboiled rice has a higher content of [blank_start]fats[blank_end] than white rice.

Suvarna has three mixtures P, Q and R, of salt and sand. He wants to separate the salt from the three mixtures by following the procedure shown in the schematic below. He can use the SMALLEST quantity of water to separate ALL the salt from [blank_start]P mixture[blank_end].

Identical bottles filled with water at 15 degree Celsius are kept under different weather conditions as shown below. On the outer side of [blank_start]A[blank_end] bottle are MOST water droplets likely to form within 10 minutes.

Ripening of fruits on the plant can be quickened by making life stressful for the plant. This happens because stressing out a plant makes it concentrate more efforts on fruit production and ripening. Reducing the amount of water given to plants is the best method to stress out plants. This is easy to do in a drier climate. Which of the following is likely to cause stress in a plant by the SAME method, in a place having a wet climate?

Mirrors are place at different places in a maze made of black cardboard. A torch is shone into a maze from one opening as shown in the figure. The light ray will come out of the maze from [blank_start]A opening[blank_end].

The GREENHOUSE EFFECT [blank_start]raises[blank_end] the temperature of the planet. The actual rise is not very much, but the earth’s ecosystem is very fragile and small changes can have [blank_start]large[blank_end] effects. The inter governmental panel on climate has predicted that the world’s average temperature will rise by one degree by the year 2025. This could lead to a sharp [blank_start]fall[blank_end] in the world’s food production , leading to much [blank_start]higher[blank_end] food prices and even less food for the poorest in the world. However it would also mean that some countries which are further north would be able to grow crops they had never been able to before, although there is less land as you move northwards.

The desert sidewinder rattlesnake (Figure 1) moves sideways by coiling and uncoiling its body repeatedly. At any moment in its locomotion , only two portions of its body (dark bands in Figure 2) touch the ground. Choose any Two advantages of this method of locomotion.

Harder materials can scratch softer materials. Gypsum, Calcite, Feldspar and Topaz are 4 types of rocks with different hardness. The ''flowchart'' shown here helps us identify which rocks are harder than others. Based on this flowchart, which of the following will definitely NOT be scratched by a fingernail? Harder materials can scratch softer materials. Gypsum, Calcite, Feldspar and Topaz are 4 types of rocks with different hardness. The ''flowchart'' shown here helps us identify which rocks are harder than others. Based on this flowchart, which of the following will definitely NOT be scratched by a fingernail? Harder materials can scratch softer materials. Gypsum, Calcite, Feldspar and Topaz are 4 types of rocks with different hardness. The ''flowchart'' shown here helps us identify which rocks are harder than others. Based on this flowchart, which of the following will definitely NOT be scratched by a fingernail?

When heated , candle wax changes from solid to liquid. The molecules [blank_start]absorb heat[blank_end] and [blank_start]move apart[blank_end]

Some substances are acidic while others are basic. A scale called the pH scale is used to measure the extent of acidity. The pH of the solution if a little ACID is added to a beaker of WATER (original pH = 7) will be [blank_start]little less than 7[blank_end]

The molecules of 4 different substances are represented below. Which of them is probably a COMPOUND?

The schematic shown in the figure represents the human circulatory system. Which of the marked vessels in the schematic is an artery?

We have three types of muscles in our bodies - cardiac, smooth and skeletal. Cardiac muscles work to move blood in and out of the heart; smooth muscles work to move food in the digestive system and skeletal muscles work to move some other parts, for example, our limbs. What is common to the way the three muscle types work?

Three gases found in Earth's atmosphere are carbon dioxide, nitrogen and oxygen. Their order of abundance from greatest to least is [blank_start]oxygen[blank_end], [blank_start]nitrogen[blank_end], and [blank_start]carbon dioxide[blank_end].

The whirligig beetle usually swims on the SURFACE of water looking for smaller organisms as food. It has special eyes, EACH divided into parts , on either side of its head.How do such special divided eyes help a whirligig beetle? They help it to see ________

The following is a picture of a pond which has different kinds of plants growing in and around it. The plant/plants likely to perform photosynthesis is [blank_start]Plant X[blank_end].

A flag tree or banner tree is one in which branches are killed or deformed by the almost constant strong winds from one side , giving the tree a characteristic flag-like appearance. In which of the places is the flag tree LEAST likely to be found?

Koalas have adapted to eat only the leaves of the eucalyptus trees which are very low in protein and highly poisonous to many other types of animals. How is this adaptation likely to benefit the koala bears?

Which of the following characteristics of an animal determines the distance to be kept between the two bars of the animal guard, to prevent the animal from walking across it?

Blood circulating in our body follows a particular sequence. Which of the following is the correct sequence of blood flow?

What could be the reason for the osprey to hold the fish on this manner?