Question1.
Fill in the blanks in the following
(i) Artificial magnets are made in different shapes such as __________, __________ and ____________.
(ii) The Materials which are attracted towards a magnet are called________.
(iii) Paper is not a ______ material.
(iv) In olden days, sailors used to find direction by suspending a piece of
___________.
(v) A magnet always has __________ poles.
Answer:
(i) Artificial magnets are made in different shapes such as bar-magnet, cylindrical magnet and horse-shoe magnet.
(ii) The Materials which are attracted towards a magnet are called magnetic material.
(iii) Paper is not a magnetic material.
(iv) In olden days, sailors used to find direction by suspending a piece of bar-magnet.
Question2.
State whether the following statements are true or false
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Answer:
Answer:
Upper respiratory infection
Respiratory disease
Sinusitis
Answer:
The primary regulatory sites include the cardiovascular centers in the brain that control both cardiac and vascular functions. Neurological regulation of blood pressure and flow depends on the cardiovascular centers located in the medulla oblongata.
Explanation:
Answer:
When lymph nodes are enlarged or sensitive to the touch, it's your body's way of alerting that your body is fighting an infection. They can also be an early warning system for certain types of cancer, such as lymphoma, leukemia, and breast cancer.
