How old is the oldest writing? 5,500 years ago What is the oldest writing system still in use today? As far as written languages go, Sumerian and Egyptian seem to have the earliest writing systems and are among the earliest recorded languages, dating back to around 3200BC. But the oldest written language that is still […]
How do we measure light?
What enzymes act inside the small intestine?
What enzymes act inside the small intestine? The enzymes that act inside the small intestine are amylase, protease, and lipase. Amylase acts on starch and breaks it down into small carbohydrate molecules. Protease acts on proteins and breaks them down into amino acids. Lipase breaks down dietary fats into smaller molecules called fatty acids and […]
Do all plant cells have vacuoles?
Do all plant cells have vacuoles? Most mature plant cells have one large vacuole that typically occupies more than 30% of the cell’s volume, and that can occupy as much as 80% of the volume for certain cell types and conditions. Strands of cytoplasm often run through the vacuole. Do all plant cells have a […]
What food is the highest in water?
What food is the highest in water? Cucumbers are made up of around 96% water – that’s the highest water content of any food. They’re also low in calories, and a source of vitamins and fibre. Tip: Add cucumber to your salads, snack on cucumber vegetable sticks with hummus or blend cucumber with mint and […]
How can a source be both primary and secondary?
How can a source be both primary and secondary? Primary and secondary categories are often not fixed and depend on the study or research you are undertaking. For example, newspaper editorial/opinion pieces can be both primary and secondary. If exploring how an event affected people at a certain time, this type of source would be […]
What does a subscript mean in math?
What does a subscript mean in math? A small letter or number placed slightly lower than the normal text. Examples: • the number 1 here: A1 (pronounced “A sub 1” or just “A 1”) What does a subscript tell you? Chemical formulas use letters and numbers to represent chemical species (i.e., compounds, ions). The numbers […]
How do you know if work has been done on an object?
What makes the two plate to move away from each other?
What makes the two plate to move away from each other? A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. Two plates sliding past each other forms […]
How do you write a letter of thank you?
How do you write a letter of thank you? What to Include in a Thank-You Letter Address the person appropriately. At the start of the letter, address the person with a proper salutation, such as “Dear Mr. Say thank you. Give (some) specifics. Say thank you again. Sign off. Send it as soon as possible. […]