Question

D. Answer the following questions in not more than 80 words.
1. What does the solar system consist of? Draw a diagram of the solar system.
2. Explain the types of motions of planets.
3. Why is life found only on the earth?
4. Explain the phases of the moon.​

Answer 1

Answer:

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Answer 2

♥hєчα mαtє♥

1) ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ ɪs ᴛʜᴇ sᴜɴ ᴀɴᴅ ᴀʟʟ ᴛʜᴇ ᴏʙᴊᴇᴄᴛs ᴛʜᴀᴛ ᴏʀʙɪᴛ ᴀʀᴏᴜɴᴅ ɪᴛ. ᴛʜᴇ sᴜɴ ɪs ᴏʀʙɪᴛᴇᴅ ʙʏ ᴘʟᴀɴᴇᴛs, ᴀsᴛᴇʀᴏɪᴅs, ᴄᴏᴍᴇᴛs ᴀɴᴅ ᴏᴛʜᴇʀ ᴛʜɪɴɢs.

ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ ɪs ᴀʙᴏᴜᴛ 4.6 ʙɪʟʟɪᴏɴ ʏᴇᴀʀs ᴏʟᴅ.ɪᴛ ғᴏʀᴍᴇᴅ ʙʏ ɢʀᴀᴠɪᴛʏ ɪɴ ᴀ ʟᴀʀɢᴇ ᴍᴏʟᴇᴄᴜʟᴀʀ ᴄʟᴏᴜᴅ. ᴍᴏsᴛ ᴏғ ᴛʜɪs ᴍᴀᴛᴛᴇʀ ɢᴀᴛʜᴇʀᴇᴅ ɪɴ ᴛʜᴇ ᴄᴇɴᴛᴇʀ, ᴀɴᴅ ᴛʜᴇ ʀᴇsᴛ ғʟᴀᴛᴛᴇɴᴇᴅ ɪɴᴛᴏ ᴀɴ ᴏʀʙɪᴛɪɴɢ ᴅɪsᴋ ᴛʜᴀᴛ ʙᴇᴄᴀᴍᴇ ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ. ɪᴛ ɪs ᴛʜᴏᴜɢʜᴛ ᴛʜᴀᴛ ᴀʟᴍᴏsᴛ ᴀʟʟ sᴛᴀʀs ғᴏʀᴍ ʙʏ ᴛʜɪs ᴘʀᴏᴄᴇss.

ᴛʜᴇ sᴜɴ ɪs ᴀ sᴛᴀʀ. ɪᴛ ᴄᴏɴᴛᴀɪɴs 99.9% ᴏғ ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ's ᴍᴀss.ᴛʜɪs ᴍᴇᴀɴs ᴛʜᴀᴛ ɪᴛ ʜᴀs sᴛʀᴏɴɢ ɢʀᴀᴠɪᴛʏ. ᴛʜᴇ ᴏᴛʜᴇʀ ᴏʙᴊᴇᴄᴛs ᴀʀᴇ ᴘᴜʟʟᴇᴅ ɪɴᴛᴏ ᴏʀʙɪᴛ ᴀʀᴏᴜɴᴅ ᴛʜᴇ sᴜɴ. ᴛʜᴇ sᴜɴ ɪs ᴍᴏsᴛʟʏ ᴍᴀᴅᴇ ᴏᴜᴛ ᴏғ ʜʏᴅʀᴏɢᴇɴ, ᴀɴᴅ sᴏᴍᴇ ʜᴇʟɪᴜᴍ.

ᴛʜᴇʀᴇ ᴀʀᴇ ᴇɪɢʜᴛ ᴘʟᴀɴᴇᴛs ɪɴ ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ. ғʀᴏᴍ ᴄʟᴏsᴇsᴛ ᴛᴏ ғᴀʀᴛʜᴇsᴛ ғʀᴏᴍ ᴛʜᴇ sᴜɴ, ᴛʜᴇʏ ᴀʀᴇ: ᴍᴇʀᴄᴜʀʏ, ᴠᴇɴᴜs, ᴇᴀʀᴛʜ, ᴍᴀʀs, ᴊᴜᴘɪᴛᴇʀ, sᴀᴛᴜʀɴ, ᴜʀᴀɴᴜs ᴀɴᴅ ɴᴇᴘᴛᴜɴᴇ. ᴛʜᴇ ғɪʀsᴛ ғᴏᴜʀ ᴘʟᴀɴᴇᴛs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴛᴇʀʀᴇsᴛʀɪᴀʟ ᴘʟᴀɴᴇᴛs. ᴛʜᴇʏ ᴀʀᴇ ᴍᴏsᴛʟʏ ᴍᴀᴅᴇ ᴏғ ʀᴏᴄᴋ ᴀɴᴅ ᴍᴇᴛᴀʟ, ᴀɴᴅ ᴛʜᴇʏ ᴀʀᴇ ᴍᴏsᴛʟʏ sᴏʟɪᴅ. ᴛʜᴇ ʟᴀsᴛ ғᴏᴜʀ ᴘʟᴀɴᴇᴛs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ɢᴀs ɢɪᴀɴᴛs. ᴛʜɪs ɪs ʙᴇᴄᴀᴜsᴇ ᴛʜᴇʏ ᴀʀᴇ ᴍᴜᴄʜ ʟᴀʀɢᴇʀ ᴛʜᴀɴ ᴏᴛʜᴇʀ ᴘʟᴀɴᴇᴛs ᴀɴᴅ ᴀʀᴇ ᴍᴏsᴛʟʏ ᴍᴀᴅᴇ ᴏғ ɢᴀs.

ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ ᴀʟsᴏ ᴄᴏɴᴛᴀɪɴs ᴏᴛʜᴇʀ ᴛʜɪɴɢs. ᴛʜᴇʀᴇ ᴀʀᴇ ᴀsᴛᴇʀᴏɪᴅ ʙᴇʟᴛs, ᴍᴏsᴛʟʏ ʙᴇᴛᴡᴇᴇɴ ᴍᴀʀs ᴀɴᴅ ᴊᴜᴘɪᴛᴇʀ. ғᴜʀᴛʜᴇʀ ᴏᴜᴛ ᴛʜᴀɴ ɴᴇᴘᴛᴜɴᴇ, ᴛʜᴇʀᴇ ɪs ᴛʜᴇ ᴋᴜɪᴘᴇʀ ʙᴇʟᴛ ᴀɴᴅ ᴛʜᴇ sᴄᴀᴛᴛᴇʀᴇᴅ ᴅɪsᴄ. ᴛʜᴇsᴇ ᴀʀᴇᴀs ʜᴀᴠᴇ ᴅᴡᴀʀғ ᴘʟᴀɴᴇᴛs, ɪɴᴄʟᴜᴅɪɴɢ ᴘʟᴜᴛᴏ, ᴍᴀᴋᴇᴍᴀᴋᴇ, ᴀɴᴅ ᴇʀɪs. ᴛʜᴇʀᴇ ᴀʀᴇ ᴛʜᴏᴜsᴀɴᴅs ᴏғ ᴠᴇʀʏ sᴍᴀʟʟ ᴏʙᴊᴇᴄᴛs ɪɴ ᴛʜᴇsᴇ ᴀʀᴇᴀs. ᴛʜᴇʀᴇ ᴀʀᴇ ᴀʟsᴏ ᴄᴏᴍᴇᴛs, ᴄᴇɴᴛᴀᴜʀs, ᴀɴᴅ ᴛʜᴇʀᴇ ɪs ɪɴᴛᴇʀᴘʟᴀɴᴇᴛᴀʀʏ ᴅᴜsᴛ.

sɪx ᴏғ ᴛʜᴇ ᴘʟᴀɴᴇᴛs ᴀɴᴅ ᴛʜʀᴇᴇ ᴏғ ᴛʜᴇ ᴅᴡᴀʀғ ᴘʟᴀɴᴇᴛs ᴀʀᴇ ᴏʀʙɪᴛᴇᴅ ʙʏ ᴍᴏᴏɴs. ғᴜʀᴛʜᴇʀᴍᴏʀᴇ, ᴘʟᴀɴᴇᴛᴀʀʏ ᴅᴜsᴛ ᴏʀʙɪᴛs ᴛʜᴇ ɢᴀs ɢɪᴀɴᴛs. ᴍᴀɴʏ ᴏᴛʜᴇʀ sʏsᴛᴇᴍs ʟɪᴋᴇ ᴛʜᴇ sᴏʟᴀʀ sʏsᴛᴇᴍ ʜᴀᴠᴇ ʙᴇᴇɴ ғᴏᴜɴᴅ. ᴇᴀᴄʜ ᴏғ ᴛʜᴇ ʙɪʟʟɪᴏɴs ᴏғ sᴛᴀʀs ɪɴ ᴛʜᴇ ᴍɪʟᴋʏ ᴡᴀʏ ɢᴀʟᴀxʏ ᴍɪɢʜᴛ ʜᴀᴠᴇ ᴀ ᴘʟᴀɴᴇᴛᴀʀʏ sʏsᴛᴇᴍ.

2) ᴇᴀʀᴛʜ ʀᴏᴛᴀᴛᴇs ᴏɴ ɪᴛs ᴏᴡɴ ᴀxɪs, ɪɴ ᴀ ᴄᴏᴜɴᴛᴇʀ-ᴄʟᴏᴄᴋᴡɪsᴇ ғᴀsʜɪᴏɴ ᴀɴᴅ ᴄᴏᴍᴘʟᴇᴛᴇs ᴏɴᴇ ʀᴏᴛᴀᴛɪᴏɴ ɪɴ ᴀʟᴍᴏsᴛ... ᴇᴀʀᴛʜ ʜᴀs ᴛᴡᴏ ᴅɪғғᴇʀᴇɴᴛ ᴛʏᴘᴇs ᴏғ ᴍᴏᴛɪᴏɴs. ᴇᴀʀᴛʜ ʀᴏᴛᴀᴛᴇs ᴏɴ ɪᴛs ᴏᴡɴ ᴀxɪs ᴀɴᴅ ᴛʜɪs ᴛʏᴘᴇ ᴏғ ᴍᴏᴛɪᴏɴ ɪs ᴄᴀʟʟᴇᴅ ʀᴏᴛᴀᴛɪᴏɴ. ᴇᴀʀᴛʜ ᴀʟsᴏ ʀᴏᴛᴀᴛᴇs ᴀʀᴏᴜɴᴅ ᴛʜᴇ sᴜɴ ɪɴ ᴀɴ ᴇʟʟɪᴘᴛɪᴄᴀʟ ᴏʀʙɪᴛ ᴀɴᴅ sᴜᴄʜ ᴍᴏᴛɪᴏɴ ɪs ᴄᴀʟʟᴇᴅ ᴀ ʀᴇᴠᴏʟᴜᴛɪᴏɴ.

3) ʟɪғᴇ ɪs ᴘᴏssɪʙʟᴇ ᴏɴ ᴛʜᴇ ᴇᴀʀᴛʜ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ ғᴏʟʟᴏᴡɪɴɢ ʀᴇᴀsᴏɴs: 1). ᴘʀᴇsᴇɴᴄᴇ ᴏғ ᴇssᴇɴᴛɪᴀʟ ᴇʟᴇᴍᴇɴᴛs:ᴛʜᴇ ᴇᴀʀᴛʜ ʜᴀs ᴇssᴇɴᴛɪᴀʟ ᴇʟᴇᴍᴇɴᴛs ʟɪᴋᴇ ᴄᴀʀʙᴏɴ, ʜʏᴅʀᴏɢᴇɴ, ɴɪᴛʀᴏɢᴇɴ ᴀɴᴅ ᴏxʏɢᴇɴ. ᴛʜᴇsᴇ ᴇʟᴇᴍᴇɴᴛs ᴄᴏᴍʙɪɴᴇ ᴛᴏ ғᴏʀᴍ ᴘʀᴏᴛᴇɪɴs- ᴛʜᴇ ʙᴜɪʟᴅɪɴɢ ʙʟᴏᴄᴋs ᴏғ ʟɪғᴇ. 2). ᴘʀᴇsᴇɴᴄᴇ ᴏғ ᴏxʏɢᴇɴ: ʟɪғᴇ ᴄᴀɴɴᴏᴛ sᴜʀᴠɪᴠᴇ ᴡɪᴛʜᴏᴜᴛ ᴏxʏɢᴇɴ. ᴛʜᴇ ᴇᴀʀᴛʜ ʜᴀs ᴀ ʟᴀʀɢᴇ ᴀᴍᴏᴜɴᴛ ᴏғ ᴏxʏɢᴇɴ ɪɴ ᴛʜᴇ ᴀɪʀ. 3). ᴘʀᴇsᴇɴᴄᴇ ᴏғ ᴡᴀᴛᴇʀ: ᴡᴀᴛᴇʀ ɪs ᴀʟsᴏ ᴇssᴇɴᴛɪᴀʟ ғᴏʀ ʟɪғᴇ. ᴛʜᴇ ᴇᴀʀᴛʜ ʜᴀs ᴠᴀsᴛ ʀᴇsᴇʀᴠᴇs ᴏғ ᴡᴀᴛᴇʀ. ᴡᴀᴛᴇʀ ʀᴇɢᴜʟᴀᴛᴇs ʙᴏᴅʏ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴀɴᴅ ᴀʟsᴏ ʜᴇʟᴘs ɪɴ ᴘʀᴏᴄᴇssᴇs ʟɪᴋᴇ ᴅɪɢᴇsᴛɪᴏɴ, ᴇxᴄʀᴇᴛɪᴏɴ, ᴇᴛᴄ.ᴘʀᴇsᴇɴᴄᴇ ᴏғ ᴀᴛᴍᴏsᴘʜᴇʀᴇ: ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ ʜᴀs ᴀ ᴘʀᴏᴛᴇᴄᴛɪᴠᴇ ʟᴀʏᴇʀ ᴏғ ᴏᴢᴏɴᴇ ɢᴀs ᴡʜɪᴄʜ sᴀᴠᴇs ᴛʜᴇ ᴇᴀʀᴛʜ ғʀᴏᴍ ʜᴀʀᴍғᴜʟ ᴇғғᴇᴄᴛs ᴏғ ᴜʟᴛʀᴀᴠɪᴏʟᴇᴛ ʀᴀᴅɪᴀᴛɪᴏɴ ғʀᴏᴍ ᴛʜᴇ sᴜɴ. 5). ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴏғ ᴇᴀʀᴛʜ: ᴛʜᴇ ᴇᴀʀᴛʜ’s ᴅɪsᴛᴀɴᴄᴇ ғʀᴏᴍ ᴛʜᴇ sᴜɴ ɢɪᴠᴇs ɪᴛ ᴛʜᴇ ʀɪɢʜᴛ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ғᴏʀ ᴛʜᴇ ᴅᴇᴠᴇʟᴏᴘᴍᴇɴᴛ ᴏғ ʟɪғᴇ-ғᴏʀᴍs. ɪғ ᴛʜᴇʀᴇ ᴡᴇʀᴇ ᴇᴠᴇɴ ᴀ ᴛᴇɴ ᴘᴇʀᴄᴇɴᴛ ɪɴᴄʀᴇᴀsᴇ ᴏʀ ᴅᴇᴄʀᴇᴀsᴇ ɪɴ ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ғʀᴏᴍ ᴛʜᴇ sᴜɴ, ᴛʜᴇ ᴇᴀʀᴛʜ ᴡᴏᴜʟᴅ ʜᴀᴠᴇ ʙᴇᴇɴ ᴀ ᴄᴏʟᴅ ᴏʀ ʜᴏᴛ ᴅᴇsᴇʀᴛ. 6). ʀɪɢʜᴛ ᴀᴍᴏᴜɴᴛ ᴏғ ᴍᴀss ᴀɴᴅ ɢʀᴀᴠɪᴛᴀᴛɪᴏɴᴀʟ ғᴏʀᴄᴇ: ᴛʜᴇ ᴇᴀʀᴛʜ ʜᴀs ᴛʜᴇ ʀɪɢʜᴛ ᴀᴍᴏᴜɴᴛ ᴏғ ᴍᴀss. ᴛʜɪs ᴍᴀss ᴘʀᴏᴅᴜᴄᴇs sᴛʀᴏɴɢ ɢʀᴀᴠɪᴛᴀᴛɪᴏɴᴀʟ ғᴏʀᴄᴇ. ᴛʜɪs ғᴏʀᴄᴇ ʜᴏʟᴅs ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ ɪɴᴛᴀᴄᴛ.

4) ᴛʜᴇ 8 ᴘʜᴀsᴇs (ɪɴ ᴏʀᴅᴇʀ) ᴀʀᴇ:

• The Lunar Month.
• New Moon.
• Waxing Crescent Moon.
• First Quarter Moon.
• Waxing Gibbous Moon.
• Full Moon.
• Waning Gibbous Moon.
• Third Quarter Moon.