Sponge and sea star show calcareous protective material. Do they belong to the same Phylum?

Sponge and Sea star show calcareous protective material. Do they belong to the same Phyla?

Diagram-based questions: Observe the following figur and answer the following : Due to which common characterstic the animals shown in the figure belong to the same phylum ?

Crab and Snail both have a protective covering. Is it made up of the same material?

Atoms of two different elements are represented in the following diagram. Do these elements belong to the same group ? Justify your answer.

Answer the following questions: Observe the following diagram and answer the following questions: Do these elements belong to the same group? Explain.

Observe the garbage collected in the dustbin of you classroom and make a list of the various material in it. Discuss with your teacher, how these materials can be properly disposed off. Can we do the same with the garbage generated in our house? Think about it.

Characters of a phylum are given below. Read them carefully and answer the questions : : (a) Spines of calcium carbonate are present on the body. (b) These animals are exclusively marine. (c) They perform the locomotion with the help of tube feet. (d) Their skeleton is made up of calcareous plates or spicules. Animals of which phylum show the above character?

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: Which pair of elements do you think will have similar properties? a. Sodium and Argon b. Sodium and Potassium c. Potassium and Neon

Read the paragraph and answer the questions given below : Our atmosphere is getting hotter. more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled”. The green house gases such as water vapour, carbon dioxide, methane, nitrous oxide, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natural disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exterminate us. What can we do to reverse effects climate change?

Choose the correct alternative and write its alphabet against the sub question number: Calcareous spines are present on the body of ................ animal. fish snail sponge star fish