On the field. During a game, cards are normally placed face-down by Setting them. Face-down cards on the field can be flipped face-up. (Flip Summon for monster and Activation for Spell/Trap cards, in general cases) However, face-up cards cannot be Flipped face-down, unless an effect specifically states so..
Then, does flipping a monster face down negate its effect?
The monster does not have its effects negated and is not destroyed during the End Phase, even if it is later flipped face-up.
One may also ask, when can you flip summon a monster? It can only be performed when the game state is open during your Main Phase. You simply flip a face-down monster manually into face-up Attack Position. A monster is considered to be not on the Field during the Flip Summon's Summon negation window.
Additionally, can you flip a monster into face up defense?
When you Flip Summon, you cannot change the monster to face-up Defense Position, only to face- up Attack Position. A Monster Card cannot be Flip Summoned in the same turn that it was Set onto the field. You cannot use most monsters' effects until they are face-up.
Can card effects be activated when face down?
Face-down cards cannot activate effects, unless the card says otherwise. The effect of "Pyramid Turtle" activates in the Graveyard, when it is sent to the Graveyard after it has been flipped face-up and destroyed by battle. Being face-down will not change this or prevent the effect from activating.
Related Question Answers
Can you Fusion summon with face down monsters?
When Fusion Summoning with "Polymerization", you can use a monster which is face-down on the field as a Fusion Material monster. When doing so, you must show it to your opponent to confirm that it is a proper Fusion Material.Can you negate flip effects?
Result: Negating a Flip Summon is to prevent the action of Summoning from occuring, which is preventing the game action of manually changing a Face-down monster to Face-up, so its FLIP effect is not triggered and will not ever activate.Can you Special Summon in face down defense?
It's important to remember that a monster Set on the field in face-down Defense Position IS NOT considered Summoned. It has been Set and can be Summoned with a Flip Summon or flipped face-up by an attack or card effect.How many fusion monsters can you have?
You can have up to 15 cards in the Extra Deck. The Extra Deck can contain Xyz Monsters, Synchro Monsters and Fusion Monsters, in any combination. These cards are not counted towards the 40-card minimum limit of your Main Deck.When can you activate quick effects?
During your opponent's turn, you can activate Quick Effects in Box C, D, or E. (Exception: During the Damage Step, the only Quick Effects you can activate are those that directly modify ATK/DEF, negate activations, mention an activation timing that occurs only during the Damage Step, or belong to Desrook Archfiend.)Is Monster reborn banned?
One card can indeed change the outcome of the game -- and Monster Reborn does so very easily. It got banned because it's costless revival, and can revive from either graveyard.Do Synchro Monsters go to the graveyard?
Synchro Summoning During the Main Phase 1 or 2, the turn player can Synchro Summon a Synchro Monster from the Extra Deck by sending monsters they control to the Graveyard (at least 1 Tuner and 1 or more non-Tuner monsters), provided the total Level of those monsters matches exactly the Level of that Synchro Monster.How many cards can you have in your deck Yugioh?
60 cards
How many trap cards can you activate per turn?
Unlike your Monster Cards, Spells and Traps have no once-per-turn restriction on them. During your turn, you could play all your Spell Cards, or Set all your Spell and Trap Cards. But if you watch many veteran Duelists, you'll notice they don't set all their Spell and Trap Cards right away.Can you activate spell cards on your opponent's turn?
These are special Spell Cards that can be activated during any Phase of your turn, not just your Main Phase. You can also activate them during your opponent's turn if you Set the card face-down first, but then you cannot activate the card in the same turn you Set it.Can special summoned monsters change position?
Each monster's battle position can only be changed manually once per turn. If a monster is Summoned, Normal Set, or declares an attack (even if the attack was negated or cancelled due to a replay), it cannot manually change its battle position for the rest of that turn.How do you summon XYZ?
When you're ready to Xyz Summon, just take the Xyz Material monsters and pile them up on the field. Then take the matching Xyz Monster you're Summoning out of your Extra Deck, and Summon it. Then place the pile of Xyz Materials underneath it. That's right: The Xyz Materials go UNDERNEATH the Xyz Monster.Is Flip summon considered normal?
A flip summon does not count as a normal summon. For this effect to activate you would have to summon it from your hand in face up attack position (a normal summon as stated).When can you activate a trap card?
A Trap Card must first be Set and can only be activated after the current turn has finished. After that, it may be activated during either player's turn. Trap Cards are Spell Speed 2, with the exception of Counter Trap Cards, which are Spell Speed 3.What happens if you attack a monster with the same defense?
If their ATK is equal, both monsters are destroyed. If a Defense Position monster is attacked and the attack target's DEF is less than the attacking monster's ATK, the attack target is destroyed by battle, but neither player takes battle damage (unless the attacking monster inflicts piercing battle damage).Can you activate quick play spells from your hand?
Quick-Play Spell Cards may be activated from your hand during your turn; they cannot be activated from your hand during your opponent's turn.Does once per turn mean any turn?
Generally speaking, with most cards, it'll say “once per turn, during either player's turn” or say “quick effect” before the effect if it's one that can be activated this way. As per OP's example, the card in question can only be activated during their own turn.How many monsters can you flip Summon per turn?
A flip summon is a manual position change, which is limited to one per monster per turn.Can you Fusion Summon from your hand?
If you have all the Fusion Material Monsters listed on the Fusion Monster Card (either on the field or in your hand) you can activate "Polymerization," placing it in your Spell & Trap Card Zone. Finally, place the "Polymerization" card in the Graveyard. 
